Got a photo? Identify fish instantly with the Fishby app.
Open the appDescription
The Brown Rockfish (Sebastes auriculatus) is a demersal marine fish belonging to the family Sebastidae. It is a relatively small to medium-sized rockfish characterized by its mottled brown coloration, often with darker blotches and a distinctive dark spot on the operculum. This species is a common inhabitant of rocky reefs and kelp forests along the Pacific coast of North America, playing an important ecological role as a mesopredator.
Physical Characteristics
- Body shape
- compressed
- Coloration
- Variable, typically mottled brown, olive-brown, or reddish-brown, often with darker blotches or bands. The ventral surface is usually lighter. A key identifying feature is a prominent dark brown or black spot on the operculum (gill cover).
- Scale type
- ctenoid
- Mouth position
- terminal
- Distinctive features
- Prominent dark spot on the operculum (gill cover)., Mottled brown coloration with darker blotches., Relatively large mouth with a slightly projecting lower jaw., Strongly spined head, typical of rockfish.
- Dorsal fin
- Single, deeply notched dorsal fin with 13 spines and 12-14 soft rays.
- Tail fin
- Truncate to slightly emarginate caudal fin.
- Pectoral fin
- Large, rounded pectoral fins with 15-18 rays.
- Distinctive fins
- Anal fin with 3 spines and 6-8 soft rays. Pelvic fins thoracic with 1 spine and 5 rays.
Identification Tips
Opercular Spot
Look for a distinct, dark brown or black spot on the operculum (gill cover). This is the most reliable distinguishing feature.
Coloration
Observe the overall mottled brown to olive-brown body color, often with irregular darker blotches or bands that help it camouflage with rocky substrates.
Head Spines
Note the presence of strong spines on the head, particularly above the eyes and on the operculum, characteristic of rockfish.
Dorsal Fin
Count the dorsal fin spines (13) and rays (12-14). The deeply notched appearance of the dorsal fin is also helpful.
Habitat
- Water type
- saltwater
- Depth
- Typically found from the intertidal zone down to about 183 meters (600 feet), most commonly in shallower waters (0-90 meters).
- Environment
- Associated with rocky reefs, kelp forests, artificial structures (piers, jetties), and occasionally soft bottoms near rocky areas. They are demersal and often found resting on the bottom or within crevices.
- Geographic range
- Eastern North Pacific Ocean, from Prince William Sound, Alaska, south to Cedros Island, Baja California, Mexico.
Aquarium Information
- Care level: advanced
- Temperament: semi-aggressive
- Diet: carnivore
- Minimum tank size: 250 gallons
- Temperature: 50-60°F (10-16°C)
- pH level: 7.8-8.4
- Hardness: 8-12 dKH
- Compatibility: Best kept in a species-specific tank or with other large, robust, cold-water marine fish that cannot be consumed. Avoid small fish or invertebrates.
- Special requirements: Requires a large, well-filtered cold-water aquarium with ample rockwork for hiding and territorial establishment. Excellent water quality and stable temperatures are crucial. Live or frozen meaty foods are essential for diet.
Wild Information
- Conservation status: least concern
- Seasonality: Can be caught year-round, but fishing effort may vary seasonally with weather and regulations.
- Market price: Low to moderate, often caught as bycatch or for local consumption.
- Commercial importance: low
- Taste: Mild, flaky white flesh.
- Texture: Firm, moist.
- Cooking methods: Baking, Grilling, Frying, Steaming
- Nutritional value: Good source of lean protein and Omega-3 fatty acids.
Key Facts
Livebearersbehavior
Like all rockfish, Brown Rockfish are viviparous, meaning they give birth to live young (larvae) rather than laying eggs. Females can release tens of thousands of larvae in a single spawning event.
Longevityinteresting
Brown Rockfish are relatively long-lived for their size, with individuals known to live for over 30 years. This slow growth and late maturity make them vulnerable to overfishing.
Camouflage Mastersbehavior
Their mottled brown coloration provides excellent camouflage against rocky substrates and kelp, allowing them to ambush prey and avoid predators effectively.
Habitat Generalistsinteresting
While preferring rocky reefs, Brown Rockfish are quite adaptable and can be found in a variety of habitats, including kelp forests, artificial structures, and even soft bottoms adjacent to rocky areas.
Safety Information
Venomous- Safety level: venomous
- Venomous: Yes
- Edibility: edible
- Handling notes: Like all rockfish, Brown Rockfish possess venomous spines in their dorsal, anal, and pelvic fins. Punctures can cause immediate and intense pain, swelling, and in some cases, nausea or dizziness. Handle with extreme caution, using thick gloves or a fish gripper. Avoid direct contact with spines. If stung, immerse the affected area in hot (but not scalding) water to denature the protein-based venom and seek medical attention if symptoms are severe or persistent.
Similar Species
Copper Rockfish
Sebastes caurinus
Copper Rockfish typically have a more coppery or olive-brown coloration with lighter patches, and lack the distinct dark opercular spot of the Brown Rockfish. They often have a pale stripe along the lateral line.
Gopher Rockfish
Sebastes carnatus
Gopher Rockfish have a darker brown to black background color with distinct, often pinkish or whitish, blotches. They also lack the prominent dark opercular spot and tend to have a more robust body shape.
Grass Rockfish
Sebastes rastrelliger
Grass Rockfish are typically green to olive-green, often with darker mottling, and have a much larger mouth and a more robust body. They lack the opercular spot and are more associated with kelp and eelgrass beds.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Scorpaeniformes
- Family
- Sebastidae
- Genus
- Sebastes
- Species
- auriculatus
Explore Brown Rockfish
Identify fish anywhere
Free on iOS, Android, and Web. Photo identification, full species details, and more.