Marine biology is the study of animal and plant life within saltwater ecosystems. Given that in biology many phyla, families and genera have some species that live in the sea and others that live on land, marine biology deals with those species in which life is spent only (or mainly) in the water, thus its classification is based on the environment rather than on taxonomy. Phyla Porifera (sponges) Ctenophora (comb jellies) Cnidaria Placozoa Bilateria Acoelomorpha Orthonectida Rhombozoa ? Myxozoa Superphylum Deuterostomia     Chordata (vertebrates, etc. ... Divisions Green algae land plants (embryophytes) non-vascular embryophytes Hepatophyta - liverworts Anthocerophyta - hornworts Bryophyta - mosses vascular plants (tracheophytes) seedless vascular plants Lycopodiophyta - clubmosses Equisetophyta - horsetails Pteridophyta - true ferns Psilotophyta - whisk ferns Ophioglossophyta - adderstongue ferns seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta - ginkgo Gnetophyta - gnetae Magnoliophyta - flowering... In ecology, an ecosystem is a community of organisms (plant, animal and other living organisms - also referred as biocenose) together with their environment (or biotope), functioning as a unit. ... Biology is the science of life (from the Greek words bios = life and logos = reasoned account). ... Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ... Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ... Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ... Sunset at sea A sea is a large expanse of saline water connected with an ocean, or a large, usually saline, lake that lacks a natural outlet such as the Caspian Sea and the Dead Sea. ... Environment - Wikipedia /**/ @import /skins/monobook/IE50Fixes. ... Taxonomy (from Greek ταξινομία from the words taxis = order and nomos = law) may refer to either a hierarchical classification of things, or the principles underlying the classification. ...

Overview

Marine biology covers a great deal, from the microscopic plankton, including femtoplankton as small as 0.02 micrometers, and together with phytoplankton, hugely important as the primary producers of the sea, to the huge cetaceans (or whales) which reach up to a reported 33 meters (109 feet) in length. Photomontage of plankton organisms Plankton is the aggregate community of weakly swimming but mostly drifting small organisms that inhabit the water column of the ocean, seas, and bodies of freshwater. ... Phytoplankton Phytoplankton refers to the algal component of the plankton that drifts in the water column. ... Phytoplankton Primary production is the production of organic molecules from inorganic materials through photosynthesis or chemosynthesis. ... Suborders Mysticeti Odontoceti (see text) The order Cetacea includes whales, dolphins and porpoises. ...

The habitats included by investigation in marine biology include everything from the tiny layers of surface water in which organisms and abiotic items may be trapped in surface tension between the ocean and atmosphere, to the depths of the abyssal trenches, sometimes 10,000 meters or more beneath the surface of the ocean. Along the way, habitats such as coral reefs, kelp forests, tidepools, muddy, sandy, and rocky bottoms, and the open ocean (pelagic) zone, where solid objects are rare and the surface of the water is the only visible boundary. Some of the biodiversity of a coral reef. ... Kelp forests are a type of marine ecosystem established around colonies of kelp; they contain rich biodiversity. ...

A large (exactly how large is unknown at this point) proportion of all life on earth is contained in the oceans. While the oceans comprise about 71% of the Earth's surface, due to their depth they encompass about 300 times the habitable volume of the terrestrial habitats on Earth. Earth, also known as the Earth or Terra, is the third planet outward from the Sun. ...

Many species are economically important to humans, including the food fishes. It is also becoming understood that the well being of marine organisms and non ocean dwelling organisms is linked in some very fundamental ways. Human understanding of the relationship between life in the sea and important cycles of matter (such as the carbon cycle) and movement of energy through ecosystems is also growing, despite large areas beneath the surface of the ocean remaining effectively unexplored. A fishery (plural: fisheries) is an organized effort by humans to catch fish or other aquatic species, an activity known as fishing. ... See CNO cycle for the thermonuclear reaction involving carbon that helps power stars. ...

Subfields

The marine ecosystem is large, and thus there are quite a number of subfields in marine biology, mostly involving specializations in particular species and biomes, such as reef habitats, tide pool ecology, and geothermal/hydrothermal vents. Tide pools at a beach Closeup of a tide pool with some algae and barnacles Tide pools are areas on rocks by the ocean that are filled with seawater. ...

There are also subfields reserved for studying the physical effects of continual immersion in sea water, and the ocean in general, as well as for the ways that various changing oceanic properties affect marine life. Not being our realm, scientists study how various organisms have adapted to this salty environment. In addition, a subfield of marine biology studies the relationships between oceans and ocean life, and global weather and environmental issues (such as carbon dioxide displacement). Sea water is water from a sea or ocean. ... Carbon dioxide is an atmospheric gas composed of one carbon and two oxygen atoms. ...

Recent marine biotechnology has focused largely on marine biomolecules, especially proteins, that may have uses in medicine or engineering. An interesting branch of marine biology is aquaculture. Marine environments are the home to many exotic biological materials that may inspire biomimetic materials. Many marine biomolecules have found technology applications. ... A representation of the 3D structure of myoglobin, showing coloured alpha helices. ... Aquaculture (sometimes misspelled aquiculture) is the cultivation of aquatic organisms, such as fish, shellfish, algae and other aquatic plants. ...

Related fields

Marine biology is closely linked to both oceanography and biology. It also encompasses ideas from ecology. Fisheries science can be considered a partial offshoot of marine biology, as can marine conservation. Oceanography (from Ocean + Greek γράφειν = write), also called oceanology and marine science is the study of the earths oceans and their interlinked ecosystems and chemical and physical processes. ... Biology is the science of life (from the Greek words bios = life and logos = reasoned account). ... Ecology can mean either: the natural environment, or an analysis or study using the principles and methods of ecological science. ... A fishery (plural: fisheries) is an organized effort by humans to catch fish or other aquatic species, an activity known as fishing. ...

Lifeforms

Microscopic life

Microscopic life undersea is incredibly varied and still poorly understood. For example, at one end of the scale, the role of viruses in marine ecosystems is barely being explored even in the beginning of the 21st century. Three types of viruses: a bacterial virus, otherwise called a bacteriophage (left center); an animal virus (top right); and a retrovirus (bottom right). ... (20th century - 21st century - 22nd century - other centuries) Definition In calendars based on the Christian Era or Common Era, such as the Gregorian calendar, the 21st century is the current century, as of this writing, lasting from 2000-2099. ...

The role of phytoplankton is better understood due to their critical position as the most numerous primary producers on Earth. Phytoplankton fit into these categories: cyanobacteria (also called blue-green algae/bacteria), various types of algae: red, green, brown, and yellow-green, diatoms, dinoflagellates, euglenoids, coccolithophorids, cryptomonads, crysomonads, chloromonads, prasinomonads, and silicoflagellates. Phytoplankton Phytoplankton refers to the algal component of the plankton that drifts in the water column. ... The algae (singular is alga) comprise several different groups of living things that produce energy through photosynthesis. ...

Zooplankton tend to be somewhat larger, and not all in this list are microscopic. Many Protozoa are zooplankton, including dinoflagellates (yes, some of these are phytoplankton as well: the plant/animal distinction often breaks down in very small organisms), zooflagellates, foraminiferans, and radiolarians. Other zooplankton include cnidarians, ctenophores, chaetognaths, annelids such as polychaetes, molluscs, arthropods, and urochordates. Even many larger animals begin their life in the zooplankton before they become large enough to take their familiar forms. Fish larvae generally begin life as zooplankton and sea stars (a.k.a. starfish) do too, just as two examples of the many. Photomontage of plankton organisms Plankton is the aggregate community of weakly swimming but mostly drifting small organisms that inhabit the water column of the ocean, seas, and bodies of freshwater. ... Protozoa (in Greek protos = first and zoon = animal) are single-celled creatures with nuclei that show some characteristics usually associated with animals, most notably mobility and heterotrophy. ... A larva (Latin; plural larvae) is a juvenile form of animal with indirect development, undergoing metamorphosis (for example, insects or amphibians). ... Orders many Sea stars or starfish are animals belonging to phylum Echinodermata, class Asteroidea. ...

Plant life

Plant life is relatively rare undersea, most of the niche occupied by plants on land is actually occupied by macroscopic algae in the ocean, such as Sargassum and kelp. The plants that do survive in the sea are often found in shallow waters, such as the seagrasses (of which eelgrass, Zostera, and turtlegrass, Thalassia are examples). The intertidal zone is also a good place to find plant life in the sea, where mangroves or cordgrass might grow. Generally, a niche is a special place within the scheme of things. ... The algae (singular is alga) comprise several different groups of living things that produce energy through photosynthesis. ... Kelp are large seaweeds, belonging to the brown algae and classified in the order Laminariales. ... Above and below water view at the edge of the mangal Mangroves are woody trees or shrubs that grow in mangrove habitats or mangal (Hogarth, 1999). ...

Other sea life

Cnidarias such as Jellyfish and sea anemone, Ctenophoras, sea worms including phylums: Plathyhelminthes, Nemertea, Annelida, Sipuncula, Echiura, and the Phoronidas; Mollusca including shellfish and squid and octopus, Crustaceans, Poriferas including sponges, Bryozoa, Echinoderms including starfish, Urochordata - sea squirts or tunicates. This article is about jellyfish, the sea creatures. ... Families Many, see text. ... A worm is any of numerous relatively small elongated soft-bodied invertebrate animals. ... Phylum is one of the levels of scientific classification of organisms; see the Phylum (biology) article. ... Shellfish is a term used to describe molluscs and crustaceans used as food. ... Suborders Myopsina Oegopsina Squids are the large, diverse group of marine mollusks, popular as food in cuisines as widely separated as the Japanese and the Italian. ... Families 14 in two suborders, see text The octopus is a cephalopod of the order Octopoda that inhabits many diverse regions of the ocean, especially coral reefs. ... Classes Remipedia Cephalocarida Branchiopoda Ostracoda Maxillopoda Malacostraca The crustaceans (Crustacea) are a large group of arthropods (55,000 species), usually treated as a subphylum. ... Sponges, or poriferans, are animals of the phylum Porifera. ... Fossilized Bryozoa, Ordovician limestone, Batavia, Ohio Bryozoans (moss animals) are tiny colonial animals that generally build stony skeletons of calcium carbonate, superficially similar to coral. ... Classes Asteroidea Concentricycloidea Crinoidea Echinoidea Holothuroidea Ophiuroidea Echinoderms (Echinodermata) is a phylum of marine animals found in the ocean at all depths. ... Classes Ascidiacea Thaliacea Appendicularia Urochordata (sometimes known as tunicata and commonly called urochordates, tunicates or sea squirts) is the subphylum of saclike filter feeders with input and output siphons. ... Classes Ascidiacea Thaliacea Appendicularia Urochordata (sometimes known as tunicata and commonly called urochordates, tunicates or sea squirts) is the subphylum of saclike filter feeders with input and output siphons. ... Classes Ascidiacea Thaliacea Appendicularia Urochordata (sometimes known as tunicata and commonly called urochordates, tunicates or sea squirts) is the subphylum of saclike filter feeders with input and output siphons. ...

Fish

Main article: Fish Atlantic herring, Clupea harengus, the most abundant fish species in the world. ...

Fishes inhabit the largest, (by volume) biome on planet earth and since they exist in a watery environment it means that very different biological functions have evolved. Fish anatomy includes two chamber heart, operculum, secretory cells that produce mucous, swim bladder, scales, fins, gills, lips and eyes. Fish breathe under water by extracting oxygen from sea water through their gills. Fins are used to propel and stabilize them in their watery environment. In ecology, a biome is a major regional group of distinctive plant and animal communities well adapted to the regions physical environment. ... This article is about biological evolution. ... In Biology operculum (Latin for little lid) has been used to describe several completely separate features. ... Cells in culture, stained for keratin (red) and DNA (green) The cell is the structural and functional unit of all living organisms. ... The word mucous is an adjective which means pertaining to mucus or having the qualities of mucus. ... The gas bladder (also fish maw, less accurately swim bladder or air bladder) is an internal organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth, ascend, or descend without having to waste energy in swimming. ... Scale (botany) Scale (zoology) Scale (medical) Scale (music) Scale (measurement) Scale (chemical) Scale (social sciences) Scale (spatial) Scale (computing) Order of magnitude Logarithmic scale Scale model Architects scale Engineers scale This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same... A fin is a surface used to produce thrust or to steer while traveling in water, air, or other fluid media. ... In aquatic organisms, gills are a respiratory organ for the extraction of oxygen from water and for the excretion of carbon dioxide. ... The mouth, also known as the buccal cavity or the oral cavity, is the opening through which an animal or human takes in food. ... Diagram of a human eye. ... General Name, Symbol, Number Oxygen, O, 8 Chemical series nonmetals Group, Period, Block 16 (VIA), 2, p Density, Hardness 1. ...

Well known fish include: sardines, anchovy, tuna, clownfish (also known as anemonefish), and bottom fish which include halibut and ling cod. Predators include sharks and barracuda. Sardines or pilchards are a group of several types of small oily fish related to herrings, family Clupeidae. ... The anchovies are a family (Engraulidae) of small but common fish. ... Species Thunnus alalunga Thunnus albacares Thunnus atlanticus Thunnus maccoyii Thunnus obesus Thunnus orientalis Thunnus thynnus Thunnus tonggol Tuna are several species of ocean-dwelling fish in the family Scombridae, mostly in the genus Thunnus. ... Species Twenty-seven, including: Amphiprion allardi - Allards Clownfish Amphiprion melanopus - Cinnamon Clownfish Amphiprion clarkii - Clarks Anemonefish Amphiprion ocellaris - Ocellaris Clownfish Amphiprion percula - Percula Clownfish Amphiprion perideraion - Pink Skunk Clownfish Amphiprion polymnus - Saddleback Clownfish Amphiprion sebae - Sebae Clownfish Amphiprion tricinctus - Three-Band Anemonefish Amphiprion ephippium - Tomato Clownfish Amphiprion frenatus... A big halibut (left) A halibut is a type of flatfish. ... This snapping turtle is trying to make a meal of a Canada goose, but the goose is too wary. ... Orders see article text below Sharks are a group (superorder Selachimorpha) of fish, with a full cartilaginous skeleton, a streamlined body plan with between 5 and 7 gill slits along the sides (most often) or side of the head (the first modified slit is behind the eye and called a... This article is about a type of fish, for other uses see barracuda (disambiguation) The barracuda (Sphyraenus, family Sphyraenidae) is a ray_finned fish notable for its large size (up to 1. ...

Marine mammals

There are five main types of marine mammals.

• Cetaceans include toothed whales (Suborder Odontoceti), such as the Sperm Whale, dolphins, and porpoises. Cetaceans also include baleen whales (Suborder Mysticeti), such as Gray Whales, Humpback Whales, and Blue Whales.
• Sirenians include manatees, the Dugong, and the extinct Steller's Sea Cow.
• Seals (Family Phocidae), sea lions (Family Otariidae - which also include the fur seals), and the Walrus (Family Odobenidae) are all considered pinnipeds.
• Sea Otters are members of the Family Mustelidae, which includes weasels and badgers.
• Finally, Polar Bears (Family Ursidae) are sometimes considered marine mammals because of their dependence on the sea. In the USA they are protected under marine mammal protection laws.

Suborders Mysticeti Odontoceti (see text) The order Cetacea includes whales, dolphins and porpoises. ... Families See text The toothed whales (systematic name Odontoceti) form a suborder of the cetaceans. ... Families See text The toothed whales (systematic name Odontoceti) form a suborder of the cetaceans. ... Binomial name Physeter macrocephalus Linnaeus, 1758 Sperm Whale range The Sperm Whale (Physeter macrocephalus) is the largest of the toothed whales and is the largest toothed animal in the world. ... This article is about the dolphin mammal. ... Genera Neophocaena Phocoena - Harbor porpoises Phocoenoides - Dalls porpoises The porpoises are small cetaceans of the family Phocoenidae; they are related to whales and dolphins. ... Families Balaenidae Balaenopteridae Eschrichtiidae Neobalaenidae Scientifically known as the Mysticeti, the baleen whales, also called whalebone whales or great whales, form a suborder of the order cetacea. ... Families Balaenidae Balaenopteridae Eschrichtiidae Neobalaenidae Scientifically known as the Mysticeti, the baleen whales, also called whalebone whales or great whales, form a suborder of the order cetacea. ... Binomial name Eschrichtius robustus Lilljeborg, 1861 Gray Whale range The Gray Whale (Eschrichtius robustus) is a whale which travels between feeding and breeding grounds yearly. ... Binomial name Megaptera novaeangliae (Borowski, 1781) Humpback Whale range The Humpback Whale (Megaptera novaeangliae) is a mammal which belongs to the baleen whale suborder. ... Binomial name Balaenoptera musculus Linneus, 1758 Blue Whale range The Blue Whale (Balaenoptera musculus) is a mammal which belongs to the baleen whales suborder. ... Families Dugongidae Trichechidae For information about the Gothic Metal band, see Sirenia (band) Sirenia are herbivorous mammals of coastal waters. ... Species Trichechus inunguis Trichechus manatus Trichechus senegalensis Manatees (family Trichechidae, genus Trichechus) are large aquatic mammals sometimes known as sea cows. ... Binomial name Dugong dugon (Müller, 1776) The Dugong (Dugong dugon) is the smallest member of the order Sirenia (which also includes the manatees and Stellers Sea Cow). ... subfamilies Otariidae Phocidae Odobenidae Pinnipeds are large marine mammals belonging to the Pinnipedia, a family (sometimes a suborder or superfamily, depending on the classification scheme) of the order Carnivora. ... Genera Monachus (Monk Seals) Mirounga (Elephant Seal) Lobodon (Crabeater Seals) Leptonychotes Hydrurga (Leopard Seals) Ommatophoca Erignathus (Bearded Seals) Phoca Halichoerus (Gray Seals) Cystophora (Hooded Seals) The true seals or earless seals are one of the three main groups of mammals within the seal suborder, Pinnipedia. ... Genera Eumetopias Zalophus Otaria Neophoca Phocarctos A sea lion rookery at Monterey, California A sea lion is any of several marine mammals of the family Otariidae. ... Binomial name Odobenus rosmarus (Linnaeus, 1758) Subspecies Walruses are large semi-aquatic mammals that live in the cold Arctic seas of the Northern Hemisphere. ... subfamilies Otariidae Phocidae Odobenidae Pinnipeds are large marine mammals belonging to the Pinnipedia, a family (sometimes a suborder or superfamily, depending on the classification scheme) of the order Carnivora. ... Binomial name Enhydra lutris (Linnaeus, 1758) The Sea Otter (Enhydra lutris) is a large otter native to the North Pacific, from northern Japan and Kamchatka west across the Aleutian Islands south to California. ... Subfamilies Lutrinae Melinae Mellivorinae Taxidiinae Mustelinae Mustelidae is a family of carnivorous mammals. ... Alternate uses: Weasel (disambiguation) Species Mustela africana Mustela altaica Mustela erminea Mustela eversmannii Mustela felipei Mustela frenata Mustela kathiah Mustela lutreola Mustela lutreolina Mustela nigripes Mustela nivalis Mustela nudipes Mustela putorius Mustela sibirica Mustela strigidorsa Mustela vison Weasels are mammals in the genus Mustela of the Mustelidae family. ... For other uses, see Badger (disambiguation). ... The name Polar Bear is also a tradename for a type of scuba divers warm undersuit to be worn under a drysuit. ... For other meanings, see Bear (disambiguation). ...

Reefs

Reefs comprise some of the densest bio habitats in the world as far as number of species within a given area. They can be incredibly diverse. Even cold water reefs. Tropical reefs are known best though, and exist in most tropical waters. Reefs are built up by coral and other calcined deposits, usually on top of a rocky outcrop on the ocean floor. Reefs can evolve on other things too though, which has given rise to the human ability to create artificial reefs. A reef surrounding an islet. ... The tropics are the geographic region of the Earth centered on the equator and limited in latitude by the two tropics: the Tropic of Cancer in the north and the Tropic of Capricorn in the southern hemisphere. ... Orders see Anthozoa zsnobordinkid505@aol. ... General Name, Symbol, Number calcium, Ca, 20 Series alkaline earth metal Group, Period, Block 2 (IIA), 4, s Density, Hardness 1550 kg/m3, 1. ... An artificial reef is a man made reef, usually built for the purpose of promoting marine life. ...

Currently much attention in marine biology is focused on coral reefs and the El Niño weather phenomenon. In the 1998 coral reefs experienced a "once in a thousand years" bleaching event, which killed off vast expanses of reefs across the globe, due to sea surface temperatures rising well above normal. Some reefs are recovering, but scientists say that 58% of the world's coral reefs are now endangered and predict that global warming could exacerbate this trend. El Niño is also the nickname of Sergio García. ... 1998 is a common year starting on Thursday of the Gregorian calendar, and was designated the International Year of the Ocean. ... Global Mean Temperatures 1880-2005 Global warming is a term used to describe an increase over time of the average temperature of Earths atmosphere and oceans. ...

Deep sea and trenches

The ocean is deep, very deep in some places. The deepest recorded measure to date is the Mariana Trench, near the Philippines, in the Pacific at 10,924 m (35,838 ft). Water pressure at these depths is extreme and there is no light from above, but some life still exists here. Small flounder (family Soleidae) fish and shrimp were seen by the American crew of the bathyscaphe Trieste when it dived to the bottom in 1960. The Mariana Trench is the deepest known submarine trench, and the deepest location in the Earth itself. ... The Republic of the Philippines is a country of South East Asia, located in the western Pacific Ocean some 1,210 km (750 mi) from mainland Asia. ... Water pressure is the pressure in any system for supplying water, usually a domestic water system, although the term is used in other contexts as well, such as a municipal water system. ... Genera (22 genera) The soles are a family (Soleidae) of flatfishes found in both oceans and freshwater, feeding on small crustaceans and other invertebrates. ... The Bathyscaphe Trieste A bathyscape or bathyscaphe is a self-propelled deep-sea diving submersible, consisting of a crew cabin similar to a bathysphere suspended below a float filled with a buoyant liquid such as petrol. ... Location within Italy Trieste ( Latin Tergeste, Slovenian and Croatian Trst, German and Friulian Triest) is a city in northeastern Italy, capital of Friuli-Venezia Giulia region and Trieste province, population 211,184 (2001). ... 1960 was a leap year starting on Friday (link will take you to calendar). ...

Other notable deeps include Monterey Canyon, in the eastern Pacific, the Tonga Trench in the south west at 32,000 feet (9,750 meters), the Philippine trench, the Puerto Rico Trench at 8,605 m (28,232 ft), the Romanche Trench at 7,760 m (24,450 ft), Fram Basin in the Arctic at 4,665 m (15,305 ft), the Java Trench at 7,450 m (24,442 ft), and the South Sandwich Trench at 7,235 m (23,737 ft). The Tonga trench is located in the Pacific ocean and is 32,000 ft (9,900 m) deep. ... The Puerto Rico Trench is a seismic fault located in the Caribbean sea and the Atlantic ocean. ... Wikipedia does not yet have an article with this exact name. ...

In general the deep sea is considered to start at the photic zone, the point where sunlight loses its power of transference through the water. Many life forms that live at these depths have the ability to create their own light. Much life centers around seamounts that rise from the deeps. Fish and other sea life use these as congregating areas, for spawning, and feeding. Hydrothermal vents in the ocean floor act as oases for life, as do their opposites, cold seeps. These places support unique biomes and many new microbes have been discovered at these places. The photic zone is the depth of the water, whether in a lake or an ocean, that is exposed to sufficient sunlight for photosynthesis to occur. ... Hydrothermal vents are fissures in a planets surface from which geothermally heated water issues. ... Tubeworms, soft corals and chemosynthetic mussels at a seep located 3,000 metres down on the Florida Escarpment. ... In ecology, a biome is a major regional group of distinctive plant and animal communities well adapted to the regions physical environment. ...

How oceanic factors affect distribution of various organisms

An active research topic in marine biology, is discovering and mapping the life cycles of various species and where they spend their time. Marine Biologists study how the ocean currents and tides affect ocean life, and the effect of the multitudes of other oceanic factors on their growth, distribution and well being. This has only recently become technically feasible with the advances in GPS and newer underwater visual devices. A life cycle includes the major sexual stages of a species, especially in regard to its ploidy. ... An ocean current is any more or less permanent or continuous, directed movement of ocean water that flows in one of the Earths oceans. ... This article is about tides in the ocean. ... Over fifty GPS satellites such as this NAVSTAR have been launched since 1978. ...

Most ocean life and fish breed in specific places, nest or not in others, spend their time as juveniles in still others, and in maturity in yet others. Scientists were at a loss for quite a while as to the location of many species during different parts of their life cycles. In fact where sea turtles travel is still largely unknown. Tracking devices just don't work for some life forms, and the rigors of the ocean are not friendly to technology. But these factors are being overcome in many instances. Genera Caretta Lepidochelys Chelonia Eretmochelys Natator Dermochelys Sea turtles are large, ocean-dwelling turtles. ... Technology ( Gr. ...

History of marine biology

In recent times, marine biologists are trying to complete the mapping of underwater species with the help of modern techniques, which could help in exploring the deepest oceanic depressions in which it is supposed that new species could be found, eventually of potential great interest also for the theories on evolution. Many universities teach courses in marine biology. This article is about biological evolution. ... A university is an institution of higher education and of research, which grants academic degrees. ...

See also

• Important publications in marine biology

This is a list of important publications in biology, organized by field. ...

External link

• MarineBio: an evolving online tribute to Marine Biology and all Ocean life. (http://marinebio.org/)