How to Identify Vermilion Rockfish

To identify Vermilion Rockfish (Sebastes miniatus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Varies from bright vermilion red to orange, often mottled with gray or olive patches on the back and sides. The belly is typically lighter, pinkish to white. Fins are usually reddish. Juveniles may have darker blotches or bars.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Rough patch of scales on the underside of the lower jaw (symphyseal knob)., Three to five strong spines on the lower margin of the orbit (suborbital spines)., Strongly spined head, particularly above the eyes and on the operculum., Lateral line often appears lighter against the darker body coloration.

Dorsal fin

Single, deeply notched dorsal fin with 13 spines and 13-15 soft rays. The spiny portion is longer than the soft-rayed portion.

Tail fin

Truncate to slightly emarginate caudal fin.

Pectoral fin

Large, fan-like pectoral fins with 17-19 rays, typically reaching beyond the anus.

Distinctive fins

Anal fin with 3 spines and 7-8 soft rays. Pelvic fins thoracic with 1 spine and 5 soft rays.

Identification Tips

1. 1

   Coloration

   Look for the vibrant red to orange body, often with gray or olive mottling. This is a primary indicator, though color can vary with depth and individual.

2. 2

   Lower Jaw Scales

   Feel for a distinct, rough patch of scales on the underside of the lower jaw (symphyseal knob). This is a key diagnostic feature for Sebastes miniatus.

3. 3

   Suborbital Spines

   Count the spines along the lower margin of the eye; Vermilion Rockfish typically have 3-5 strong suborbital spines.

4. 4

   Head Spination

   Observe the strong spination on the head, particularly above the eyes and on the operculum (gill cover).

5. 5

   Pectoral Fin Length

   Note the relatively long pectoral fins that typically extend past the anus.

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