jawfishEnglishOxford New American Dictionaryjawfish /ˈjôˌfiSH, ˈdʒɔˌfɪʃ / ▸ noun (plural same or jawfishes) a small fish with very large jaws which lives in shallow tropical seas. It often inhabits a burrow in the sand, the walls of which are lined with pieces of shell and stone. Family Opistognathidae: several genera and species.