FACTOID #53: If you thought Antarctica was inhospitable, think again - its land area is only ninety-eight percent ice. Reassuringly, the other 2% is categorised as "barren rock".
Freshwater biology is a field of biology that studies the life and ecosystems of freshwater habitats. This includes animal, plant and microbial life in lakes, rivers and ponds. Freshwater angelfish at the Montreal Biodome, by mendel. ... Freshwater angelfish at the Montreal Biodome, by mendel. ... Biology (from Greek βίος λόγος, see below) is the branch of science dealing with the study of living organisms. ... For other uses, see Life (disambiguation), Lives (disambiguation) or Living (disambiguation), Living Things (disambiguation) Look up life, living in Wiktionary, the free dictionary. ... An ecosystem, a contraction of ecological and system, refers to the collection of components and processes that comprise, and govern the behavior of, some defined subset of the biosphere. ... For the village on the Isle of Wight, see Freshwater, Isle of Wight. ... Phyla Subregnum Parazoa Porifera Subregnum Eumetazoa Placozoa Orthonectida Rhombozoa Radiata (unranked) Ctenophora Cnidaria Bilateria (unranked) Acoelomorpha Myxozoa Superphylum Deuterostomia Chordata Hemichordata Echinodermata Chaetognatha Superphylum Ecdysozoa Kinorhyncha Loricifera Priapulida Nematoda Nematomorpha Onychophora Tardigrada Arthropoda Superphylum Platyzoa Platyhelminthes Gastrotricha Rotifera Acanthocephala Gnathostomulida Micrognathozoa Cycliophora Superphylum Lophotrochozoa Sipuncula Nemertea Phoronida Bryozoa Entoprocta Brachiopoda... Divisions Green algae Chlorophyta Charophyta Land plants (embryophytes) Non-vascular plants (bryophytes) Marchantiophyta - liverworts Anthocerotophyta - hornworts Bryophyta - mosses Vascular plants (tracheophytes) †Rhyniophyta - rhyniophytes †Zosterophyllophyta - zosterophylls Lycopodiophyta - clubmosses †Trimerophytophyta - trimerophytes Equisetophyta - horsetails Pteridophyta - true ferns Psilotophyta - whisk ferns Ophioglossophyta - adderstongues Seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta... A cluster of Escherichia coli bacteria magnified 10,000 times. ... A man-made lake in Keukenhof, Netherlands A lake is a body of water or other liquid of considerable size surrounded by land. ... River upstream of an Australian trout farm A river is a large natural waterway. ... A pond is typically a body of water smaller than a lake. ...
True freshwater crabs spend their entire lives in fresh water and it is a shared defining characteristic to be able to complete their entire life cycle independently of sea water.
In contrast, the newly laid eggs of freshwater crabs are much larger (about 1 mm in diameter), increase to between 3 and 5 mm in diameter as they develop, and remain attached to the pleopods of the female until hatching.
Freshwater crabs were originally known as river crabs, and were given family names such as Thelphusidae and Potamonidae, the latter name being derived from the Greek word root ‘Potamon’ meaning ‘river’;.
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