Actinopteri (ray-finned fishes) > Pleuronectiformes
(Flatfishes) > Pleuronectidae
(Righteye flounders) > Pleuronectinae
Etymology: Isopsetta: Greek, isos = equal + Greek, psetta, grouper.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; oceanodromous (Ref. 51243); depth range 20 - 425 m (Ref. 6793). Temperate; 66°N - 32°N
Eastern Pacific: Bristol Bay in the southeastern Bering Sea and Amchitka Island (Aleutian Islands) to Ventura, California, USA.
Length at first maturity / Size / Weight / Age
Maturity: Lm 21.0  range ? - ? cm
Max length : 55.0 cm TL male/unsexed; (Ref. 2850); max. reported age: 11 years (Ref. 6885)
Morphology | Morphometrics
Common in shallow water on soft, silty bottom. Moves into shallow water in summer and to deeper water in winter (Ref. 6885). Spawning adults exhibit north-south migrations (Ref. 6885). Feeds on chaetopod marine worms, young herring, shrimps, and sand dollars (Ref. 6885). A tasty food fish, sometimes marketed (Ref. 2850). Also used for mink food (Ref. 2850).
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. 125652)
Threat to humans
Fisheries: minor commercial; gamefish: yes
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 123201
): 1.1 - 7.6, mean 4.7 °C (based on 300 cells).
Phylogenetic diversity index (Ref. 82804
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00955 (0.00468 - 0.01948), b=3.08 (2.91 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.6 ±0.54 se; based on food items.
Generation time: 4.2 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.26; tmax=11; tm=2).
Fishing Vulnerability (Ref. 59153
): Low to moderate vulnerability (35 of 100).
Nutrients (Ref. 124155
): Calcium = 35 [18, 71] mg/100g ; Iron = 0.28 [0.17, 0.49] mg/100g ; Protein = 18.1 [15.8, 20.1] % ; Omega3 = 0.366 [0.184, 0.730] g/100g ; Selenium = 21 [10, 46] μg/100g ; VitaminA = 5.74 [1.47, 20.96] μg/100g ; Zinc = 0.443 [0.297, 0.672] mg/100g (wet weight); based on nutrient studies.