Bothragonus swanii (Steindachner, 1876)
Rockhead

Family:  Agonidae (Poachers), subfamily: Bothragoninae
Max. size:  8.9 cm TL (male/unsexed)
Environment:  demersal; marine; depth range 0 - 18 m
Distribution:  Eastern Pacific: Kodiak Island, Alaska to Carmel Bay, Monterey County, California, USA (southernmost range confirmed by J.R. Wolfe, pers. comm. 09/02).
Diagnosis:  Dorsal spines (total): 2-5; Dorsal soft rays (total): 4-5; Anal spines: 0-0; Anal soft rays: 4-5; Vertebrae: 32-32. Dorsal fins small; caudal fin rounded; pectoral fins large, supported well out from sides of body; pelvic fins very narrow and rays appear fused (Ref. 6885). Color very variable, depending on background; brown with dark bars, orange with bluish bars, or scarlet with brown bars (Ref. 6885).
Biology:  Inhabits intertidal areas and to 18 m depth (Ref. 2850). Frequently caught in tide pools (Ref. 28197). Its food consists mainly of tiny crustaceans (shrimp and crab-like creatures) which are picked from the bottom or very close to it (Ref. 4930). Demersal spawner in nearshore habitats (Ref. 56049).
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless


Source and more info: www.fishbase.org. For personal, classroom, and other internal use only. Not for publication.