the.com/moray eel

means A large, scaleless eel that lurks in reef crevices and bites with both a visible jaw and a hidden second set of jaws in its throat that lunges forward to drag prey down.

from English borrowed "moray" from Portuguese "moreia," itself from Latin "muraena" — the name the Romans used for the same eel, which they famously kept in ponds and, by some accounts, prized so highly that losing one was treated as a household tragedy. The Latin word is usually traced back to Greek "smyraina," though the deeper root before that is uncertain.