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Sebastes diploproa (Gilbert, 1890)

Splitnose rockfish
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Native range | All suitable habitat | Point map | Year 2050
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Sebastes diploproa   AquaMaps   Data sources: GBIF OBIS
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Image of Sebastes diploproa (Splitnose rockfish)
Sebastes diploproa
Picture by Archipelago Marine Research Ltd.

Canada country information

Common names: Lobe-jawed rockfish, Rock cod, Splitnose rockfish
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: minor commercial | Ref: Kramer, D.E. and V.M. O'Connell, 1995
Aquaculture: | Ref:
Regulations: restricted | Ref: Canadian Department of Fisheries and Oceans, 1995
Uses: gamefish: yes;
Comments: Recorded from the Pacific coast (Ref. 6885). Taken incidentally by the commercial fishery (Ref. 27437). Also Ref. 3496, 4925, 91783, 93933. In range Ref. 2850.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ca.html
National Fisheries Authority: http://www.ncr.dfo.ca/home_e.htm
Occurrences: Occurrences Point map
Main Ref: Hart, J.L., 1973
National Database:

Common names from other countries

Rocote doble hocico, Rocote doble hocico, 裂吻平鲉, ... more

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Perciformes/Scorpaenoidei (Scorpionfishes) > Sebastidae (Rockfishes, rockcods and thornyheads) > Sebastinae
Etymology: Sebastes: Greek, sebastes = august, venerable (Ref. 45335);  diploproa: From the Greek diploos and prora, meaning 'double' and 'prow' (Ref. 27436).
  More on author: Gilbert.

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; bathydemersal; depth range 0 - 800 m (Ref. 6793), usually 91 - 579 m (Ref. 2850).   Deep-water; 60°N - 27°N, 168°W - 109°W

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Northeast Pacific: Alaska Peninsula to Cedros Island, Baja California and the Gulf of California in Mexico.

Length at first maturity / Size / Weight / Age

Maturity: Lm 19.0, range 18 - ? cm
Max length : 46.0 cm TL male/unsexed; (Ref. 4925); max. published weight: 810.00 g (Ref. 40637); max. reported age: 86 years (Ref. 56049)

Short description Morphology | Morphometrics

Dorsal spines (total): 13; Dorsal soft rays (total): 11-14; Anal spines: 3; Anal soft rays: 5 - 8; Vertebrae: 26. Head spines strong - nasal, preocular, postocular, tympanic and parietal spines present, supraocular, coronal and nuchal spines absent (Ref. 27437). Toothed knob in front of each upper jaw, deep notch between jaws (Ref. 27437). Caudal fin moderately indented (Ref. 6885). A red rockfish, silver ventrally (Ref. 27437). Branchiostegal rays: 7 (Ref. 36715).

Biology     Glossary (e.g. epibenthic)

Common offshore, on soft bottoms (Ref. 2850). Young occur in shallow water, often at surface under drifting kelp (Ref. 2850). Viviparous, with planktonic larvae and pelagic juveniles (Ref. 36715, 34817). The biggest individuals are sometimes found in markets where the flesh is sold as rockfish fillet (Ref. 27436). Rarely caught by anglers (Ref. 27436).)

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Gives birth in spring (Ref. 27436).

Main reference Upload your references | References | Coordinator | Collaborators

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. 130435)

  Not Evaluated 

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: minor commercial
FAO(Publication : search) | FishSource |

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Internet sources

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Estimates based on models

Preferred temperature (Ref. 115969): 4.4 - 8.6, mean 5.9 (based on 131 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00499 - 0.02004), b=3.09 (2.92 - 3.26), in cm Total Length, based on LWR estimates for this Genus-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.5   ±0.39 se; based on food items.
Resilience (Ref. 120179):  Low, minimum population doubling time 4.5 - 14 years (tm=5; tmax=86; Fec=14,000).
Fishing Vulnerability (Ref. 59153):  Moderate vulnerability (36 of 100).
Price category (Ref. 80766):   Medium.