Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Gobiidae
(Gobies) > Sicydiinae
Etymology: Sicyopus: Greek, sika, sikya = cucumber + Greek, pous = foot (Ref. 45335).
Environment / Climate / Range
Marine; freshwater; brackish; benthopelagic; pH range: 7.0 - ? ; dH range: 5 - ?; amphidromous (Ref. 51243); depth range 0 - 2 m. Tropical; 23°C - 25°C (Ref. 2059), preferred ?; 7°N - 6°N
Asia: originally known from a fast flowing stream in Atweltota, in the middle catchment of the Kalu River, Sri Lanka. Has since been collected from Sitawaka (Kelani basin) and Kuru River at Eratne (Kalu basin) and the Opatha River at Opatha (Nilwala basin).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 4.5 cm TL male/unsexed; (Ref. 6028)
Adults are found in rocky mid-hill streams with fast flowing water. They adhere to the sides of submerged rock through sucking discs. Occur usually in water 50-150 cm deep. Carnivore. Sudden, heavy rainfall with an accompanying drop in water temperature induces spawning, usually in a cavity excavated in sand in the shelter of a stone. Eggs hatch in the event of another heavy rainfall. Larvae are swept downriver to the sea, mature adults migrate upstream to spawning grounds. Possibly amphidromous (Ref. 26364).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Pethiyagoda, R., 1991. Freshwater fishes of Sri Lanka. The Wildlife Heritage Trust of Sri Lanka, Colombo. 362 p. (Ref. 6028)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
Fisheries: of no interest; aquarium: commercial
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), based on all LWR estimates for this body shape (Ref. 93245
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .