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Teleostei (teleosts) > Ovalentaria/misc (Various families in series Ovalentaria) > Opistognathidae (Jawfishes)
Etymology: Opistognathus: Greek, opisthe = behind + Greek, gnathos = jaw (Ref. 45335); to the very elongate upper jaw of the type species of the genus, Opistognathus nigromarginatus (Ref. 128653); variabilis: Name from Latin 'variabilis', refers to the highly variable color pattern and jaw morphology of this species..

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; pelagic-neritic; depth range 0 - 37 m (Ref. 81517). Tropical

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Indo-West Pacific: from the eastern Indian Ocean (Maldive Islands and Sri Lanka) and throughout most of the central western Pacific, including the Ruykyu Islands and Palau.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 9.6 cm SL male/unsexed; (Ref. 81517)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 11; Dorsal soft rays (total): 14 - 16; Anal spines: 3; Anal soft rays: 14 - 16; Vertebrae: 28 - 30. This species is distinguished by the following characters: elongate supramaxilla and posterior end of maxilla produced as a thin flexible lamina, varying from moderate to well-developed; usually a single black stripe (well-developed in fish with elongate jaws but only slightly in those with relatively short jaws) at the inner lining of upper jaw and adjacent membranes; lateral-line ends below verticals between segmented dorsal-fin rays 3-6 (typically fourth or fifth); body with about 68-83 oblique scale rows; caudal vertebrae 19-20 (rarely 20), except only 18 in fish from northern Palawan. There are several color morphs that exist (geographic variations) (Ref. 81517).

Found in sand/rubble bottoms in 0-37 m (Ref 90102).

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Smith-Vaniz, W.F., 2009. Three new species of Indo-Pacific jawfishes (Opistognathus: Opistognathidae), with the posterior end of the upper jaw produced as a thin flexible lamina. aqua, Int. J. Ichthyol. 15(2):69-108. (Ref. 81517)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 05 March 2015

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

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Estimates based on models

Preferred temperature (Ref. 123201): 25.3 - 29.3, mean 28.6 °C (based on 2512 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 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): 3.5 ±0.6 se; based on size and trophs of closest relatives

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Opistognathus variabilis Smith-Vaniz, 2009