Opistognathus hyalinus
Opistognathus hyalinus Smith-Vaniz, 2023
Glassy jawfish

Family:  Opistognathidae (Jawfishes)
Max. size:  3.78 cm SL (male/unsexed)
Environment:  demersal; marine; depth range 20 - 70 m
Distribution:  Indo-West Pacific: Andaman Is, Philippines, Indonesia, and Papua New Guinea.
Diagnosis:  Dorsal spines (total): 11-11; Dorsal soft rays (total): 10-11; Anal spines: 2-2; Anal soft rays: 10-10. This species is distinguished from its congeners by the following set of characters: rigid upper jaw lacking flexible lamina posteriorly, extending about 0.7-1.0 eye diameters behind posterior margin of orbit; infraorbitals all trough-like, open laterally; absence of suborbital shelf on 3rd infraorbital; D XI, 10-11; A II, 10; vertebrae 10+15-17, typically 16; posterior infraorbital pore positions all or mostly occupied by single pores; preopercular pore positions occupied by single pores; total gill rakers 33-39; spinous dorsal fin with a wide submarginal dusky stripe, and interradial membranes between spines 1-4 or 5 either with or without a dark blotch of variable size and intensity; other fins unpigmented. (Ref. 128653).
Biology: 
IUCN Red List Status: Least Concern (LC); Date assessed: 17 September 2024 Ref. (130435)
Threat to humans:  harmless


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