Spirinchus thaleichthys (Ayres, 1860). Longfin Smelt. To 20 cm (8 in) TL (Morrow 1980). Kodiak Island (Maslenikov et al. 2013) to southern California (33°54’N) (Bradburn et al. 2011). Marine, brackish, and fresh waters (Moyle 2002); depth: intertidal (Miller et al. 1980), surface to about 137 m (452 ft) (Mecklenburg et al. 2002). Anadromous.