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bony fish |
Also found in: Encyclopedia, Wikipedia, Hutchinson | 0.01 sec. |
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Next, the book reviews the various organisms that live in the ocean or that rely on it for food, from bottom-dwelling bioluminescent plankton to the more familiar mollusks, bony fish, and marine mammals. The hyomandibula, which in bony fish helped move the operculum (the external gill flap) to aid in gill ventilation, was no longer necessary because the presence of lungs in early tetrapods allowed for independence from the gills. Sharks lack the inflatable swim bladder that allows bony fish to control buoyancy. |
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