Sharks Portal

The pelagic thresher, Alopias pelagicus, is a thresher shark of the genus Alopias, found in tropical oceans, at depths down to 500 m. It was first described in 1935 by Japanese ichthyologist Hiroshi Nakamura. Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Phyla Subkingdom Parazoa Porifera (sponges) Subkingdom Agnotozoa Placozoa Orthonectida Rhombozoa Subkingdom Metazoa Radiata Cnidaria Ctenophora - Comb jellies Bilateria Protostomia Acoelomorpha Platyhelminthes - Flatworms Nemertina - Ribbon worms Gastrotricha Gnathostomulida - Jawed worms Micrognathozoa Rotifera - Rotifers Acanthocephala Priapulida Kinorhyncha Loricifera Entoprocta Nematoda - Roundworms Nematomorpha - Horsehair worms Cycliophora Mollusca - Mollusks Sipuncula - Peanut worms Annelida - Segmented... Typical Classes Subphylum Urochordata - Tunicates Ascidiacea Thaliacea Larvacea Subphylum Cephalochordata - Lancelets Subphylum Myxini - Hagfishes Subphylum Vertebrata - Vertebrates Petromyzontida - Lampreys Placodermi (extinct) Chondrichthyes - Cartilaginous fishes Acanthodii (extinct) Actinopterygii - Ray-finned fishes Actinistia - Coelacanths Dipnoi - Lungfishes Amphibia - Amphibians Reptilia - Reptiles Aves - Birds Mammalia - Mammals Chordates (phylum Chordata) include the vertebrates, together with... Orders The Chondrichthyes or cartilaginous fishes are jawed fish with paired fins, paired nostrils, scales, two-chambered hearts, and skeletons made of cartilage. ... Superorders Galeomorpha Batoidea Selachimorpha Elasmobranchii is the subclass of cartilaginous fishes that includes skates, rays and sharks. ... Families Odontaspididae (sand tigers) Mitsukurinidae (goblin shark) Pseudocarchariidae (crocodile shark) Megachasmidae (megamouth shark) Alopiidae (thresher sharks) Cetorhinidae (basking shark) Lamnidae (mackerel sharks) Great Lamniformes is an order of sharks commonly known as the mackerel sharks. ... Species Alopias pelagicus Alopias superciliosus Alopias vulpinus Thresher sharks are large lamniform sharks of the family Alopiidae. ... Species For species see text. ... In biology, binomial nomenclature is the formal method of naming species. ... Image File history File linksMetadata Greyreefsharksmall2. ... Species Thresher sharks are large lamniform sharks of the family Alopiidae. ... Species For species see text. ... 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. ... The worlds oceans as seen from the South Pacific Ocean Oceans (from Okeanos in Greek, the ancient Greeks noticing the strong current that flowed off Gibraltar and assuming it was a great river) cover almost three quarters (71%) of the surface of the Earth, and nearly half of the... Ichthyology is the branch of zoology devoted to the study of fish. ...

Reproduction and growth

The pelagic thresher reproduces via ovoviviparity, this is where the embryo is nourished in the yolk sac, in later development the unborn shark is feed on ovulated eggs a process known as oophagy. At birth the young measure around 5.2 to 6.2 ft. The gestation period is unknown. The average size of the pelagic is 10 feet and a weight of 153 lb. Males reach maturity at 7 or 8 years of age, while females reach maturity at 8 or 9 years of age. In the wild the pelagic thresher can live for approximately 16 years. Ovoviviparous animals develop within eggs that remain within the mothers body up until they hatch or are about to. ... Oophagy (egg eating) is the practice of embryos feeding on eggs produced by the ovary while still inside the mothers uterus. ...

Habitat and diet

The pelagic thresher prefers open ocean where they can be found from the surface to depths of around 492 ft. They are abundant of the north-east coast of Taiwan and North American waters around California and Mexico. Their full distribution is unknown due to confusion with the long-tailed thresher, Alopias vulpinus. The pelagic thresher's preferred food are herring, flying fish and pelagic squid. They use their extremely long upper caudal fin in a whip-like fashion to stun their prey. This article is becoming very long. ... Species Clupea alba Clupea bentincki Clupea caspiopontica Clupea chrysotaenia Clupea elongata Clupea halec Clupea harengus Clupea inermis Clupea leachii Clupea lineolata Clupea minima Clupea mirabilis Clupea pallasii Clupea sardinacaroli Clupea sulcata Herrings are small oily fish of the genus Clupea found in the temperate, shallow waters of the North Atlantic... Genera Cheilopogon Cypselurus Danichthys Exocoetus Fodiator Hirundichthys Oxyporhamphus Parexocoetus Prognichthys The Execoetidae or flyingfishes are a marine fish family comprising about 70 species grouped in 7 to 9 genera. ... Suborders Myopsina Oegopsina Squids are a large, diverse group of marine cephalopods. ... Fish anatomy is primarily governed by the physical characteristics of water, which is much denser than air, holds a relatively small amount of dissolved oxygen, and absorbs light more than does air. ...

Conservation

Currently being exploited by the fishing industry and is classed as vulnerable, but is not yet a protected species.