Wiktionary
deepwater cardinalfish
n. Any of the small perciform fishes in the family ''Epigonidae'
Wikipedia
Deepwater cardinalfish
Deepwater cardinalfishes are perciform fishes in the family Epigonidae. The family includes about 43 species.
They are small fishes: the largest, Epigonus telescopus, reaches in length, and most grow to no more than or so.
They are found in temperate and tropical oceans throughout the world. They are bathydemersal fishes (inhabiting deep waters close to the sea bed) and have been found at depths of .