flashlight fish is a noun meaning "fish of deep dark waters having a light organ below each eye". It carries 2 recorded senses.
fish of deep dark waters having a light organ below each eye
fish having a luminous organ beneath eye; of warm waters of the western Pacific and Puerto Rico
Definitions, synonyms and semantic relations for flashlight fish come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.