Actinopteri (ray-finned fishes) > Gobiiformes
(Gobies) > Gobiidae
(Gobies) > Sicydiinae
Etymology: Cotylopus: Greek, kotyle = small vessel, a cup like cavity or organ + Greek, pous = feet (Ref. 45335). More on author: Guichenot.
Environment: milieu / climate zone / depth range / distribution range
Marine; freshwater; brackish; benthopelagic; amphidromous (Ref. 57749). Tropical (Ref. 26638)
Africa: Mauritius and Reunion. Wide distribution in Reunion, less abundant in Mauritius (Ref. 57749).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 13.4 cm TL male/unsexed; (Ref. 4343)
Morphology | Morphometrics
(total): 8-9. Long body almost cylindrical. Height 7 to 9 times in TL. Rounded snout. Slightly inferior mouth and prominent upper jaw. Conic teeth of the lower jaw are the same size. Head longer than high. Nape and belly without scales. Brownish to black body. Scales of the back and of the flanks marked with irregular edging ribbons brown to yellow. Second dorsal and anal fin are beige, sometimes spotted with a darker edging ribbon on the external edge for the anal fin. Pectoral and pelvic fins are greyish to brownish (Ref. 48660).
Inhabits swift clear rainforest streams, where it feeds on algae (Ref. 26638). Hatching and larval stages in the sea, post-larvae and adults in freshwater (Ref. 4343). Also Ref. 51243.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Watson, R.E., 1995. Review of the freshwater goby genus Cotylopus (Teleostei: Gobiidae: Sicydiinae). Ichthyol. Explor. Freshwat. 6(1):61-70. (Ref. 26638)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 2.0 ±0.00 se; based on food items.
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (23 of 100) .