Definition of butterfish
noun (plural same or butterfishes)
- any of a number of fishes with oily flesh or slippery skin:
- a deep-bodied edible fish of temperate and tropical seas (family Stromateidae), in particular Peprilus triacanthus of eastern North America. another term for gunnel1. an Australasian reef fish (family Odacidae), in particular the edible Odax pullus of New Zealand, which has green bones and feeds on kelp. a tropical freshwater or marine fish that is popular in aquaria (several families, including Scatophagidae).