Rosethorn rockfish
📖 Overview
Rosethorn rockfish (Sebastes helvomaculatus), first described by Ayres, 1859 is a large fish in the family Sebastidae (order Perciformes). Adults typically reach 41.00 cm in maximum length. Reported lifespan reaches approximately 87 years. It inhabits marine coastal and open-ocean environments. Recorded depth range: 25 to 549 metres. It occurs in Temperate waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. The species is important as a food fish and valued as a game and sport species. As a member of the Sebastidae, it shares life-history and morphological traits with its relatives in the group.
🔬 Taxonomy
🐟 Physical Description
Dorsal spines (total): 13; Dorsal soft rays (total): 12 - 14; Anal spines: 3; Anal soft rays: 6 - 7. Head spines very strong to strong - nasal, preocular, supraocular, postocular, tympanic and parietal spines present, nuchals usually absent, coronal spine absent . 2nd anal fin spine long . Caudal fin slightly indented . Orange or yellow with greenish mottling dorsally, lighter ventrally; 4 to 5 squarish white spots tinged or boarded with light pink or yellow on back .
🌀 Behaviour
Behavioural data for Rosethorn rockfish is currently being reviewed.
🦐 Diet
🥚 Reproduction
🌍 Habitat & Distribution
Marine; demersal; depth range 25 - 549 m . Temperate; 62°N - 27°N, 156°W - 113°W south of San Francisco, California.
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
📊 Population Risk & Fisheries
🎣 Angling Guide
- medium-heavy 7ft spinning rod
- 30-50 lb braid
- fluorocarbon leader
- grass flats
- oyster bars
- marsh drains
- deeper channel edges
Use barbless hooks, minimise air exposure, and revive fish head-first in current before release.
⚠️ Slot limits protect breeding-size fish. Verify daily bag limits.
🍽️ Edibility & Flavour
"Rosethorn rockfish is an edible species."
- Clear, bright eyes — cloudy eyes indicate age
- Firm flesh that springs back when pressed
- Fresh ocean smell, never strong or ammonia-like
- Bright red or pink gills, not grey or brown
- Shiny, moist skin with scales tightly attached
- Cloudy or sunken eyes
- Strong fishy or ammonia odour
- Soft, mushy flesh that doesn't spring back
- Discoloured or dry flesh
⚡ Nutrition
Detailed nutritional data for Rosethorn rockfish is currently being compiled from USDA FoodData Central.
🔬 Mercury Safety
Mercury data for Rosethorn rockfish has not yet been assigned. Please consult FDA/EPA guidance for general seafood safety advice.
🌿 Sustainability
🔬 Full Nutritional Profile
Per 100g - Raw, per 100g - Source: USDA FoodData Central templates (generic fish average)
🔍 Similar Species
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 31 records indexed .
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