Prickly Sculpin Identification Guide

Key identification features

• Patch of small, rough prickles (modified ctenoid scales) on the body just behind the pectoral fin base
• Large, broad head with a wide mouth and eyes set toward the top
• Mottled brown to olive body with darker blotches that blend into stream or lake substrate
• Two dorsal fins, the first low and spiny, narrowly connected to the second
• Long, rounded pectoral fins used for bracing on the bottom
• One of the largest western North American freshwater sculpins, reaching about 30 cm

Common look-alikes

• Riffle Sculpin: lacks the prickled patch and has a more slender caudal peduncle
• Coastrange Sculpin: smaller overall with a less pronounced head and reduced prickling
• Torrent Sculpin: shows bolder saddle bars across the back and a smoother, unprickled body

Where you'll see one

Prickly Sculpins inhabit streams, rivers, lakes, and brackish estuaries along the Pacific coast from Alaska to California, often burying into gravel or sitting motionless on silty bottoms during the day.