In the earth There are a lot of kinds of fish, they are beautiful and
interesting someones are strangers , exotic A fish is any member of a
paraphyletic group of organisms that consist of all gill-bearing aquatic
craniate animals that lack limbs with...
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In the earth There are a lot of kinds of fish, they are beautiful and
interesting someones are strangers , exotic 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.
[1][2] 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.
[3]
Fish are an important resourc
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