Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Opistognathidae
Etymology: Opistognathus: Greek, opisthe = behind + Greek, gnathos = jaw (Ref. 45335); castelnaui: Named for the French diplomat and ichthyologist Francis-Louis de Castelnau (1812-1880). More on author: Bleeker.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 20 - 100 m (Ref. 559). Tropical
Indo-West Pacific: widespread including the Ryukyu Islands, South China Sea and Indonesia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 25.0 cm SL male/unsexed; (Ref. 559)
soft rays: 14. This species is distinguished by the following characters: elongated supramaxilla and posterior end of maxilla produced as a thin flexible lamina; upper jaw's inner lining and adjacent membranes with one or two conspicuous black stripes; dorsal half of dorsal fin usually dark except for narrow pale margin, remainder of fin pale and often with 8 or 9 evenly spaced dark blotches that extend onto basal fourth to third of fin and slightly onto dorsum; D XI,14; body with about 90-11 0 oblique scale rows; total gill rakers 28-35 (Ref. 81517).
Inhabits open sand and rubble substrates in about 20-25 meters (Ref. 48637). May be found in depths greater than 100 m (Ref. 559). Mouthbrooders (Ref. 240).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Employ mouthbrooding to care for their young (Ref. 240).
Kailola, P.J., 1987. The fishes of Papua New Guinea: a revised and annotated checklist. Vol. II Scorpaenidae to Callionymidae. Research Bulletin No. 41, Research Section, Dept. of Fisheries and Marine Resources, Papua New Guinea. (Ref. 6192)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 118484)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 24.1 - 28.5, mean 27.5 (based on 554 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.7 ±0.6 se; Based on size and trophs of closest relatives
Vulnerability (Ref. 59153
): Low vulnerability (21 of 100) .