What is "eulachon"

Candlefish \Can"dle*fish`\, n. (Zo["o]l.)

1. A marine fish ( Thaleichthys Pacificus), allied to the smelt, found on the north Pacific coast; -- called also eulachon. It is so oily that, when dried, it may be used as a candle, by drawing a wick through it.

2. The beshow.

n. A small edible fish of North America, ''Thaleichthys pacificus''; the candlefish.

The eulachon (Thaleichthys pacificus), also oolichan, hooligan, ooligan, or candlefish, is a small anadromous ocean fish, a smelt found along the Pacific coast of North America from northern California to Alaska.