Teleostei (teleosts) > Gobiiformes
(Gobies) > Gobiidae
(Gobies) > Gobiinae
Etymology: Fusigobius: Latin, fusus = spindle + Latin, gobius = gudgeon (Ref. 45335); gracilis: Named for its being the most slender among its congeners..
More on author: Randall.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 6 - 18 m (Ref. 41649). Subtropical
Western Pacific: Ryukyu Islands to the Great Barrier Reef and New Caledonia, east to Fiji.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 4.2 cm SL male/unsexed; (Ref. 41649); 3.0 cm SL (female)
Morphology | Morphometrics
soft rays: 8;
Vertebrae: 26. Diagnosis: Dorsal rays VI - I,9. Anal rays 1,8. Pectoral rays 17-19 (usually 18). Longitudinal scale series 25. Head naked except for scales on side of nape reaching nearly to above upper end of preopercular margin; posterior nostril not close to orbit. The body is slender, depth 5.45-5.75 in SL; snout length 3.0-3.4 in head; first dorsal fin not higher than second; second dorsal spine usually longest, 5.35-5.8 in SL. Pelvic fins fully joined medially by membrane (when intact); pelvic frenum absent. Body translucent with numerous very small orange-yellow spots with blackish centers on head and body, those on head arranged in oblique rows; a black spot the size of pupil or smaller at midbase of caudal fin; a second smaller blackish spot just above base of pectoral fin; dorsal and caudal fins with orange-yellow spots; a dusky orange line from upper part of first membrane of first dorsal fin to base of second spine (Ref. 41649).
Inhabits sand-rubble bottoms next to reefs in 6-18 m (Ref. 90102).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Randall, J.E., 2001. Five new Indo-Pacific gobiid fishes of the genus Coryphopterus. Zool. Stud. 40(3):206-225. (Ref. 41649)
IUCN Red List Status (Ref. 126983)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 123201
): 24.9 - 29.3, mean 28.5 °C (based on 1509 cells).
Phylogenetic diversity index (Ref. 82804
= 0.5005 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01023 (0.00477 - 0.02194), b=3.02 (2.84 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.2 ±0.3 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).