Teleostei (teleosts) >
Gobiiformes (Gobies) >
Gobiidae (Gobies) > Gobionellinae
Etymology: Stenogobius: Greek, stenos = narrow + Latin, gobius = gudgeon (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; brackish; demersal. Tropical
Oceania: high islands of Hawaii.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 11.4 cm SL male/unsexed; (Ref. 34009)
Short description
Identification keys | Morphology | Morphometrics
Dorsal spines (total): 7; Dorsal soft rays (total): 10 - 11; Anal spines: 1; Anal soft rays: 10 - 11. Easily identified by the dark black bar extending downward through the eye and the yellow-brown body color; during courtship, both males and females with 9-11 black bars on their flanks and a red border on the edge of the dorsal fins; black eye bar becomes prominent; males develop a dusky flush to their throats and lower jaw (Ref. 44091).
Largest Insularigobius recorded; possesses a relatively high scale count in horizontal series, 47-52, usually 48-50; high predorsal scale count, always fully scaled, 16-23, usually 19-20; belly anteriorly almost always scaled close to pelvic base; breast always with many embedded scales; up to five rows of teeth in upper jaw and up to six in lower jaw (Ref. 34009).
A poor climber and thus restricted to the lower reaches and adjoining brackish waters; found in both altered and unaltered streams; omnivorous and a benthic feeder on filamentous algae, worms, crustaceans and insect larvae; not highly sought as food by the early Hawaiians (Ref. 44091). Benthic (Ref. 58302).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Nishimoto, R.T. and J.M. Fitzsimons, 1999. Behavioral determinants of the instream distribution native Hawaiian stream fishes. In: Proc. 5th Indo-Pac. Fish Conf., Noumea, 1997 [Séret B. & J.-Y. Sire, eds]. Proc. 5th Indo-Pac. Fish Conf., Noumea, 1997: 813-818. p. 813-818. In Séret B. & J.-Y. Sire (eds) Proc. 5th Indo-Pac. Fish Conf., Noumea, 1997. (Ref. 33984)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01259 (0.00666 - 0.02379), b=3.06 (2.90 - 3.22), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Trophic level (Ref.
69278): 3.6 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref.
120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
