The eulachon /ˈjuːləˌkɒn/ (Thaleichthys pacificus; also spelled oolichan /ˈuːlɪˌkɑːn/, ooligan /ˈuːlɪ.ɡən/, hooligan /ˈhuːlɪ.ɡən/), also called the candlefish, is a small anadromous ocean fish, a smelt found along the Pacific coast of North America from northern California to Alaska.