bristlemouth

noun, plural (especially collectively) bris·tle·mouth, (especially referring to two or more kinds or species) bris·tle·mouths [bris–uh l-mouth z, -mouths] /ˈbrɪs əlˌmaʊðz, -ˌmaʊθs/.

1. any of several small, deep-sea fishes of the family Gonostomatidae, having numerous sharp, slender teeth covering the jaws.