Nautichthys oculofasciatus (Girard, 1858)
Sailfin sculpin
photo by Gotshall, D.W.

Family:  Agonidae (Poachers), subfamily: Hemitripterinae
Max. size:  20 cm TL (male/unsexed)
Environment:  demersal; marine; depth range - 110 m
Distribution:  Eastern Pacific: St. Lawrence Island, Alaska to San Miguel Island, southern California, USA. Possibly occurring in Japan (Ref. 2850).
Diagnosis:  Dorsal spines (total): 8-9; Dorsal soft rays (total): 27-30; Anal spines: 0-0; Anal soft rays: 18-20. Caudal fin rounded, directed upward (Ref. 6885). Color variable, gray above with dark markings and obscure dusky bands, paler below; spinous dorsal darker; other fins except pelvic fins diagonally streaked darker; sometimes red flecks on rayed dorsal and on eyes; a very distinct black band running diagonally down and back through eye (Ref. 6885). A recognizable variant occurs in Knight Inlet, British Columbia - the first caudal fin is dominated by the II, III, I rather than the first four spines and the whole fin is frail and when removed from fluid appears more like a mast than a sail (Ref. 6885).
Biology:  Occurs inshore and to 110 m depth, mostly on rocky bottoms and areas with algae (Ref. 2850). Nocturnal (Ref. 6885). May be found upside down against roofs of crevices (Ref. 6885). Swims with its dorsal fin extended in front of its head (Ref. 6885). Eggs deposited in late winter or spring (Ref. 6885).
IUCN Red List Status: Least Concern (LC); Date assessed: 14 December 2020 Ref. (130435)
Threat to humans:  harmless


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