Coelacanth in a sentence as a noun

Sarcopterygii, perhaps, but if we're not fish on that basis, then neither are coelacanths and lungfish.

Local fishermen caught coelacanth all the time, they had no idea that university-educated foreigners considered it to be extinct.

Without DNA tests of ancient coelacanths and modern ones, how much can we say that it’s the same exact species with little change, vs a related species that evolved to be more like its extinct cousin?

Coelacanth definitions

noun

fish thought to have been extinct since the Cretaceous period but found in 1938 off the coast of Africa