Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Labridae
Etymology: Semicossyphus: Greek, semi = half + Greek, kossyphos, -ou = a kind of fish (Ref. 45335). More on author: Ayres.
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; depth range 0 - 55 m (Ref. 9311), usually 3 - 30 m (Ref. 9311). Subtropical; 37°N - 22°N, 123°W - 106°W
Eastern Pacific: Monterey Bay in California, USA to Guadalupe Island (off northern central Baja California) and Gulf of California.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 91.0 cm TL male/unsexed; (Ref. 2850); max. published weight: 16.0 kg (Ref. 2850); max. reported age: 53 years (Ref. 56049)
Prefer rocky bottom, particularly in kelp beds. Often feed on hard-shelled organisms such as sea urchins, mollusks, lobsters and crabs. Spawning occur during the summer and the eggs are pelagic (Ref. 9311). Live to more than 50 years of age. Each individual functions first as a female but changes to a male at a length of about 30 cm. Pelagic spawners (Ref. 56049). Flesh is white, of good quality and marketed fresh (Ref. 9311). The large teeth can cause serious bite wounds.
A diandric species (Ref. 55367). Transforms to a male at length of about 30.1 cm TL and 7.9 years of age (Ref. 55367). Forms leks during breeding (Ref. 55367). Pelagic spawner (Ref. 56049).
Eschmeyer, W.N., E.S. Herald and H. Hammann, 1983. A field guide to Pacific coast fishes of North America. Boston (MA, USA): Houghton Mifflin Company. xii+336 p. (Ref. 2850)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 118484)
Threat to humans
Traumatogenic (Ref. 13513)
Fisheries: commercial; gamefish: yes; aquarium: commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 16.6 - 22.9, mean 21.2 °C (based on 30 cells).
Phylogenetic diversity index (Ref. 82805
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00977 (0.00460 - 0.02076), b=3.06 (2.89 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.6 ±0.43 se; based on food items.
Generation time: 6.5 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.
Resilience (Ref. 120179
): Very Low, minimum population doubling time more than 14 years (tmax=53; tm=5; Fec=300,000).
Vulnerability (Ref. 59153
): Moderate to high vulnerability (55 of 100) .