Fish
A fish is any member of a paraphyletic group of organisms that consist of all gill-bearing aquatic craniate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups. Most fish are ectothermic ("cold-blooded"), allowing their body temperatures to vary as ambient temperatures change, though some of the large active swimmers like white shark and tuna can hold a higher core temperature. Fish are abundant in most bodies of water. They can be found in nearly all aquatic environments, from high mountain streams (e.g., char and gudgeon) to the abyssal and even hadal depths of the deepest oceans (e.g., gulpers and anglerfish). At 32,000 species, fish exhibit greater species diversity than any other group of vertebrates.
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Famous quotes containing the word fish:
“Slow, slow, as a fish she came,
Slow as a fish coming forward,
Swaying in a long wave;
Her skirts not touching a leaf,
Her white arms reaching towards me.”
—Theodore Roethke (1908–1963)
“Where no great fish venture
nor small fish glitter and dart,
only the anemones and flower
of the wild sea-thyme
cover the silent walls
of an old sea-city at rest.”
—Hilda Doolittle (1886–1961)
“Salerio. Why, I am sure if he forfeit thou wilt not take his flesh. What’s that good for?
Shylock. To bait fish withal—if it will feed nothing else, it will feed my revenge.”
—William Shakespeare (1564–1616)