How to Identify Pacific Staghorn Sculpin

To identify Pacific Staghorn Sculpin (Leptocottus armatus), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Highly variable, typically mottled brown, gray, or olive green dorsally, with lighter, often whitish or yellowish, ventral surfaces. Irregular dark blotches and bars are common, providing excellent camouflage. Fins often have dark bands or spots.

Scale type

none

Mouth position

terminal

Distinctive features

Large, branched, antler-like preopercular spine (typically 3-4 points) on each cheek, extending posteriorly., A prominent, sharp spine above each eye., Absence of scales, body covered in small prickles (tubercles)., Large, fan-like pectoral fins.

Dorsal fin

Two dorsal fins; the first with 7-9 spines, the second with 15-18 soft rays. The first dorsal fin is often notched.

Tail fin

Rounded to slightly truncate caudal fin.

Pectoral fin

Large and fan-shaped, with 15-17 rays.

Distinctive fins

Pelvic fins are thoracic, with 1 spine and 3-4 soft rays.

Identification Tips

1. 1

   Preopercular Spines

   Look for the prominent, branched, antler-like spine on each cheek, which is the most definitive characteristic. No other sculpin in its range has such a distinctly branched spine.

2. 2

   Body Covering

   Feel for the rough, prickly skin (tubercles) rather than smooth scales. This distinguishes it from some other sculpin species.

3. 3

   Habitat

   Its preference for sandy/muddy bottoms in shallow, often estuarine, environments can help narrow down identification.

4. 4

   Coloration

   The mottled brown/gray/olive coloration with irregular dark blotches is typical, providing excellent camouflage against the substrate.

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