Taxon Description (Wikipedia)
Coelacanth ( , adaptation of Modern Latin
Cœlacanthus "hollow spine", from Greek κοῖλ-ος
koilos "hollow" + ἄκανθ-α
akantha "spine", referring to the hollow spines of the fins) is the common name for an order of fish that includes the oldest living lineage of Sarcopterygii (lobe-finned fish + tetrapods) known to date.
full article at Wikipedia