Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Gobiidae
(Gobies) > Gobionellinae
Etymology: Gnatholepis: Greek, gnathos = jaw + Greek,lepis = scale (Ref. 45335); gymnocara: Named for the absence of scales on the cheek and opercle ('gymnocara' = naked head). More on authors: Randall & Greenfield.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 0 - 1 m (Ref. 41653). Subtropical
Western Pacific: Australia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 3.7 cm SL male/unsexed; (Ref. 41653)
Morphology | Morphometrics
soft rays: 11 - 12. Distinguished by the following characteristics: small Gnatholepis (up to 35.4 mm SL) lacking scales on side of cheek, opercle and predorsal midline, few cycloid scales present on pectoral fin base and on breast; no distinct flap on end of lower lip (low fold may be present); no distinct canine or enlarged teeth; second dorsal fin rays I,11; anal fin rays I,11-12 (usually I,12); pectoral rays 15-19 (usually 17); lateral scales 26-28, ctenoid; predorsal scales absent from nape midline, scales on side of head reaching to nearly behind eyes; body pale with dusky speckling and mid-lateral row of six dusky blotches and horizontal row of darker spots and short streaks, an irregular cross-shaped dark mark on cheek extending down from eye, pupil-sized brown spot just above mid-point of caudal fin base, males with small black spot on rear part of first dorsal fin (Ref. 92171).
Occurs in shallow water, generally in less than 0.5 m; at least one lot was collected from a brackish habitat (Ref. 41653).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Randall, J.E. and D.W. Greenfield, 2001. A preliminary review of the Indo-Pacific gobiid fishes of the genus Gnatholepis. Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology, 69:1-17. (Ref. 41653)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 115941)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 24.5 - 27.5, mean 26.3 (based on 166 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00851 (0.00392 - 0.01850), b=3.08 (2.90 - 3.26), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.2 ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .