| The tail fin of most ray-finned fish, with the exception of sturgeons and paddlefish, is homocercal, nearly symmetrical about the midline. |
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| Both mammals and reptiles returning to the sea developed quite workable homocercal tails in very short order. |
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| Teleosts are distinguished primarily by the presence of a homocercal tail, a tail in which the upper and lower halves are about equal. |
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| Generally, osteolepiforms have homocercal, or even trilobate, tail fins. |
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| This caudal fin structure contrasts with the externally symmetrical homocercal morphology present in most teleost fishes such as bluegill sunfish. |
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| In postflexion larvae, the caudal fin had a rounded, homocercal outline with about 8 rays in each of the upper and lower lobes. |
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