Actinopteri (ray-finned fishes) > Pleuronectiformes
(Flatfishes) > Pleuronectidae
(Righteye flounders) > Pleuronectinae
Etymology: Hippoglossoides: Greek, ippos = horse + Greek, glossa = tongue + Suffix oides = similar to (Ref. 45335). More on authors: Gill & Townsend.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; oceanodromous (Ref. 51243); depth range 0 - 530 m (Ref. 117245), usually ? - 150 m (Ref. 6793). Temperate; 77°N - 43°N, 135°E - 131°W (Ref. 117245)
North Pacific: Hokkaido, Japan and the Sea of Okhotsk north to northeast of Cape Lisburne, south to northwest of Akutan Island, Aleutian chain, Alaska. Arctic Canada.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 30.0 cm SL male/unsexed; (Ref. 559)
Morphology | Morphometrics
soft rays: 51 - 62. Mouth large; teeth on each jaw uniserial; anterior teeth on each jaw somewhat enlarged, not canine-like; upper eye completely lateral; upper surfaces of eyeballs not scaled; interorbital space narrow, not ridged, and covered with several scale rows; caudal fin slightly rounded (Ref. 559).
Benthic (Ref. 58426). Minimum depth reported at 0m (Ref. 50550).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Cooper, J.A. and F. Chapleau, 1998. Monophyly and intrarelationships of the family Pleuronectidae (Pleuronectiformes), with a revised classification. Fish. Bull. 96(4):686-726. (Ref. 30193)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): -1.6 - 5.8, mean 0.1 °C (based on 981 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00776 (0.00483 - 0.01247), b=3.09 (2.95 - 3.23), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic level (Ref. 69278
): 3.7 ±0.2 se; based on diet studies.
Generation time: 5.1 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies.
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (tmax=11; k=0.21).
Vulnerability (Ref. 59153
): Moderate vulnerability (44 of 100) .