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    fishWhat Are Fish?

    Fish are aquatic limbless vertebrate animals with gills and fins. The gills help fish breathe underwater, and the fins aid in movement. Most fish are cold-blooded, or ectothermic.

    Archerfish, Banded

    Catfish, Armored

    Piranha, Red-bellied

    Rainbowfish, Australian

    Tetra, Bucktooth

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