noun, plural (especially collectively) sand·fish, (especially referring to two or more kinds or species) sand·fish·es.
- either of two scaleless fishes of the family Trichodontidae, of the North Pacific, that live in sand or mud.
- Also called beaked salmon. a fish, Gonorhynchus gonorhynchus, inhabiting the sandy areas of the western Pacific and Indian oceans, having an angular snout with which it burrows into the sand.
- belted sandfish.