: having fleshy lobed fins : sarcopterygian
The coelacanth survives as the only known living member of a class of lobe-finned fishes that flourished in the Mesozoic Era …—
Lisa M. FitzGerald, Sea Frontiers, November/December 1992
Lisa M. FitzGerald, Sea Frontiers, November/December 1992But unlike other fish, lobe-finned fish aren't completely dependent on gills. They also have lungs with which they can breathe air …—Carl Zimmer, Discover, June 1995
compare ray-finned
Carl Zimmer, Discover, June 1995Cite this Entry
“Lobe-fin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lobe-fin. Accessed 12 Jun. 2026.
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