Inhabits open sand and rubble substrates in about 20-25 meters . May be found in depths greater than 100 m . Mouthbrooders .
Dorsal spines (total): 11; Dorsal soft rays (total): 14; Anal spines: 3; Anal soft rays: 14; Vertebrae: 28. 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 .: elongated; Cross section: oval.
Behavioural data for Castelnau's jawfish is currently being reviewed.
Diet information for Castelnau's jawfish is currently being compiled.
Employ mouthbrooding to care for their young .
Marine; demersal; depth range 20 - 100 m . Tropical West Pacific: eastern Australia to the Ryukyus, Taiwan, Philippines, Malaysia, and Indonesia.
| Scientific Name | Author | Year | Status |
|---|---|---|---|
| Opisthognathus suluensis | Herre | 1933 | Synonym |
Occurrence records from the Global Biodiversity Information Facility (GBIF) — 2 records indexed .
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