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Glyptocephalus cynoglossus (Linnaeus, 1758)

Witch flounder
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Glyptocephalus cynoglossus   AquaMaps   Data sources: GBIF OBIS
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Image of Glyptocephalus cynoglossus (Witch flounder)
Glyptocephalus cynoglossus
Picture by Dolgov, A.

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

Teleostei (teleosts) > Pleuronectiformes (Flatfishes) > Pleuronectidae (Righteye flounders) > Microstominae
Etymology: Glyptocephalus: Greek, glyptes = carver + Greek, kephale = head (Ref. 45335).
More on author: Linnaeus.

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

Marine; demersal; oceanodromous (Ref. 51243); depth range 18 - 1570 m (Ref. 5951), usually 45 - 366 m (Ref. 6263). Temperate; 2°C - 6°C (Ref. 6263); 70°N - 36°N, 79°W - 26°E

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

Western Atlantic: Gulf of St. Lawrence and Grand Banks in Canada to North Carolina in USA; Eastern Atlantic: Northern Spain to northern Norway (Ref. 7251).

Length at first maturity / Size / Weight / Age

Maturity: Lm 30.4  range ? - ? cm
Max length : 60.0 cm SL male/unsexed; (Ref. 4705); max. published weight: 2.5 kg (Ref. 35388); max. reported age: 25 years (Ref. 6263)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 95 - 120; Anal soft rays: 85 - 102. Pectoral fin of eyed side shorter than head. Distal part of pectoral fin blackish (Ref. 232). Large mucus pores on the blind side of the head. Uniform coloration, rough scales. Body elongated with complete straight lateral line (Ref. 35388).

Biology     Glossary (e.g. epibenthic)

Inhabits soft mud bottoms in fairly deep water (Ref. 9988). Benthic (Ref. 58426). Feeds on crustaceans, polychaetes, brittle stars (Ref. 9988) and fishes (Ref. 58426). Marketed fresh or frozen; eaten steamed, fried, microwaved and baked (Ref. 9988).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Eggs and larvae are pelagic.

Main reference Upload your references | References | Coordinator : Amaoka, Kunio | Collaborators

Vinnikov, K.A., R.C. Thomson and T.A. Munroe, 2018. Revised classification of the righteye flounders (Teleostei: Pleuronectidae) based on multilocus phylogeny with complete taxon sampling. Molecular phylogenetics and evolution, 125:147-162. (Ref. 122998)

IUCN Red List Status (Ref. 130435)

  Vulnerable (VU) (A1bd); Date assessed: 12 February 2021

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Fisheries: commercial
FAO - Fisheries: landings, species profile; Publication: search | FIRMS - Stock assessments | FishSource | Sea Around Us

More information

Trophic ecology
Food items
Diet compositions
Food consumptions
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Ecology
Ecology
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Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
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Abundances
Life cycle
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Maturities
Fecundities
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Distribution
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BRUVS - Videos
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Physiology
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Swimming type
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Visual pigment(s)
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Toxicities (LC50s)
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Genetics
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Synonyms
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References
References

Tools

Bio-Quiz | E-book | Field guide | Identification keys | Length-frequency wizard | Life-history tool | Point map | Classification Tree | Catch-MSY |

Special reports

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Summary page | Point data | Common names | Photos

Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Fisheries: landings, species profile; Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | National databases | OceanAdapt | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | RFE Identification | Socotra Atlas | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Preferred temperature (Ref. 123201): 0.6 - 11.4, mean 7 °C (based on 1302 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.6250   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00457 (0.00365 - 0.00573), b=3.08 (3.01 - 3.15), in cm total length, based on LWR estimates for this species (Ref. 93245).
Trophic level (Ref. 69278):  3.2   ±0.2 se; based on diet studies.
Generation time: 5.5 (4.8 - 9.9) years. Estimated as median ln(3)/K based on 11 growth studies.
Resilience (Ref. 120179):  Medium, minimum population doubling time 1.4 - 4.4 years (K=0.15-0.2; tmax=25).
Prior r = 0.32, 95% CL = 0.21 - 0.48, Based on 8 full stock assessments.
Fishing Vulnerability (Ref. 59153):  High to very high vulnerability (68 of 100).
Climate Vulnerability (Ref. 125649):  Low to moderate vulnerability (34 of 100).
Price category (Ref. 80766):   High.
Nutrients (Ref. 124155):  Calcium = 25.1 [10.1, 45.7] mg/100g; Iron = 0.237 [0.120, 0.463] mg/100g; Protein = 16.7 [15.4, 18.1] %; Omega3 = 0.36 [0.18, 0.76] g/100g; Selenium = 26.6 [13.3, 56.7] μg/100g; VitaminA = 8.58 [1.93, 36.75] μg/100g; Zinc = 0.455 [0.302, 0.676] mg/100g (wet weight);