Answer: eulachon

AnswerCrossword Clue
eulachonthe candlefish, also EULACHAN, OOLAKAN, OULACHON, OULAKAN, ULICON, ULIKON
eulachonsmall, edible, smeltlike fish, Thaleichthys pacificus, of northwestern coastal waters of North America, being so oily that when dried it can be used as a candle
eulachonlarge, blackish food fish, Anoplopoma fimbria, inhabiting waters of the North Pacific