Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 85 - 510 m (Ref. 58302). Tropical
Western Pacific: confirmed to occur from Japan, Korea and the East China Sea south
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 22.3 cm SL male/unsexed; (Ref. 7434); common length : 15.0 cm TL male/unsexed; (Ref. 9137)
soft rays: 9 - 10;
Vertebrae: 41 - 43. This species is distinguished by the following characters: D 16, rarely 15; A 10, rarely 9; pectoral fin rays 11, rarely 12; vertebrae41-43; total gill rakers 20 or 21, rarely 19 or 22; lateral line scales 42-43, rarely 41; pyloric caeca 11; in males, dorsal fin is large anteriorly, the membranes deeply incised but none of the rays are filamentous, third or fourth rays longest, reaching 25.7% SL, decreasing in length to middle of fin with posterior rays progressively longer, reaching 19.5% SL, its posterior lobe reaching to or past adipose n origin; in females, anterior end o fin lower, with membranes deeply incised and rays decreasing in length to middle of fin, lengths of subsequent rays subequal, posterior lobe reaching little more than half way to adipose fin; anal fin in males is relatively deep with posterior lobe approaching hypural crease in large individuals, smaller in females with posterior lobe reaching little more than half way to hypural crease; Males have prominent, large orange to red blotch or markings anteriorly and yellow spots posteriorly in dorsal fin, 3 broad bands on side with wide dark brown margins dorsally, wide yellow stripes on each lobe of caudal fin and white pelvic and anal fins the pelvic somewhat orange basally and anal with broad yellow stripe on basal half; females have orange to red spots scattered on dorsal fin, similar but less defined pattern on side, caudal fine with mottled yellow to orange pattern, similar pelvic fin but no yellow on anal fin (Ref. 94775j).
Found in sandy or muddle areas (Ref. 9137). Benthic (Ref. 58302). Can also be found at 30 m depths (Ref. 11230). A carnivore which feeds on fish and crabs (Ref. 9137).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Randall, J.E. and K.K.P. Lim (eds.), 2000. A checklist of the fishes of the South China Sea. Raffles Bull. Zool. Suppl. (8):569-667. (Ref. 36648)
IUCN Red List Status (Ref. 125652)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 123201
): 5.7 - 21.3, mean 15.2 °C (based on 146 cells).
Phylogenetic diversity index (Ref. 82804
= 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00437 (0.00182 - 0.01048), b=3.12 (2.91 - 3.33), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 4.0 ±0.66 se; based on food items.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Assuming tm=1-3).
Fishing Vulnerability (Ref. 59153
): Low vulnerability (17 of 100).