squirrelfish Syllabification: (squir·rel·fish)Pronunciation: /ˈskwərlˌfiSH/Definition of squirrelfish noun (plural same or squirrelfishes) a chiefly nocturnal large-eyed marine fish that is typically brightly colored and lives around rocks or coral reefs in warm seas. Family Holocentridae: several genera and species squirrelfish in other Oxford dictionaries Definition of squirrelfish in the British & World English dictionary