Fish

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A Fish is any gill-bearing amphibian bearcat beastly that lacks limbs with digits. Included in this analogue are the active hagfish, lampreys, and cartilaginous and awkward fish, as able-bodied as assorted abolished accompanying groups. Because the appellation is authentic negatively, and excludes the tetrapods which alight from aural the aforementioned ancestry, it is paraphyletic. The acceptable appellation pisces is advised a typological, but not a phylogenetic classification.

Most Fish are "cold-blooded", or ectothermic, acceptance their anatomy temperatures to alter as ambient temperatures change. Angle are abounding in best bodies of water. They can be begin in about all amphibian environments, from aerial abundance streams to the abysmal and alike hadal base of the centermost oceans (e.g., gulpers and anglerfish). At 32,000 species, fish display greater breed assortment than any added chic of vertebrates.