(Red/Black rockfishes with weak head spines)

Northern rockfish
(Sebastes polyspinis)

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Body color: Dark gray-green on reddish background; red-orange flecks and fine green spots on body; red-orange to white ventrally; oblique light band on lower portion of pectoral fin.
Maximum length: 15 in (40 cm) Peritoneum color: dark
Maximum depth: 342 fm (625 m) Shape between eyes: convex
Common depth: 27-164 fm (50-300 m) Counts: D:XIV,13-16, Ar:7-9, P1:17-19, GR:35-39, LLp:43-53,
LLs:69-70, V:28

Similar species:

Dusky (light) RF - body gray to greenish-brown; light patch on pectoral fin faint; dorsal spines typically 13.

Pacific Ocean Perch - body red w/ discrete dorsal blotches; symphyseal knob sharp, elongate (moderate in Northern RF); head spine 5 present; dorsal spines typically 13.

Redstripe RF - mottled olive-green stripes above and below light red lateral line; head spine count differs; dorsal spines typically 13; head spine 5 present.

Harlequin RF - head spines strong and spine 5 is present; anal spine 2 longer than 3 (shorter in Northern RF); dorsal blotches prominent; posterior 2/3 of lateral line light; dorsal spines typically 13.

Sharpchin RF - body red w/ dorsal blotches; head spines strong and differ in count; anal spine 2 longer than 3; dorsal spines typically 13.

Distribution: Bering Sea - British Columbia

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