Rockhead (Bothragonus swanii)

Scientific name: Bothragonus swanii Steindachner, 1876

The Rockhead (Bothragonus swanii) is a marine fish of the family Agonidae. Native range: Eastern Pacific, Kodiak Island, Alaska to Carmel Bay, Monterey County, California, USA (southernmost range confirmed by J.R. Wolfe, pers. comm. 09/02).

Biology

Dorsal spines (total): 2 - 5; Dorsal soft rays (total): 4-5; Anal spines: 0; Anal soft rays: 4 - 5; Vertebrae: 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. Color very variable, depending on background; brown with dark bars, orange with bluish bars, or scarlet with brown bars.

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name
Bothragonus swanii
Family
Agonidae (Poachers)
Order
Scorpaeniformes (Scorpionfishes and Flatheads)
Class
Actinopterygii (Ray-finned fishes)
Maximum length
8.9
Depth range
0–18 m (0–59 ft)
Environment
Marine; demersal; depth range 0 - 18 m
Climate
Temperate
Distribution
Eastern Pacific: Kodiak Island, Alaska to Carmel Bay, Monterey County, California, USA (southernmost range confirmed by J.R. Wolfe, pers. comm. 09/02).
Conservation status (IUCN)
Not Evaluated
Threat to humans
Harmless
Resilience
High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)

Sources

Taxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.

Last updated