WordNet
lobe-finned fish
n. any fish of the order Crossopterygii; most known only in fossil form [syn: crossopterygian, lobefin]
Usage examples of "lobe-finned fish".
In particular they sought lobe-finned fish of the type that presumably were ancestral to us and all other walking creatures, known as tetrapods.
The coelancanth, an early lobe-finned fish, was once confidently thought to have been a direct ancestor of the types postulated to have invaded the land and given rise to the amphibians.
It would be many months before the team was able to definitively identify the fish at Happy Fish as a coelacanth, a lobe-finned fish that first emerged in the Devonian Period of the Paleozoic Era, some 400 million years ago, and became extinct not long after the rocks of Bahariya were laid down.