Actinopteri (ray-finned fishes) > Gobiiformes
(Gobies) > Gobiidae
(Gobies) > Sicydiinae
Etymology: Sicydium: Greek, sika, sikya = cucumber ; diminutive (Ref. 45335); adelum: From the greek adelos meaning unseen, unknown, obscure, in reference to its similar appearance to the syntopic S. altum.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal; depth range - m (Ref. ), usually - m (Ref. ). Tropical; 22°C - 31°C (Ref. 36880)
Central America: Atlantic slope of Costa Rica: Parismina drainage southward to Sixaloa drainage.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 14.0 cm SL male/unsexed; (Ref. 36880)
Morphology | Morphometrics
soft rays: 10;
Vertebrae: 26. Premaxillary teeth tricuspid without overlying papillae, lateral cusps much longer than median cusp; enameloid crown short; 61-78 teeth on each premaxilla; mouth narrow; longitudinal scales 61-68; transverse scales 20-23.
Inhabits creeks and rivers between sea level and 1180 m elevation, usually present in rapids or riffles of high current velocity. Always stuck to rocks or hidden between stones. Ingests great quantities of mud, diatoms and filamentous algae that it scrapes from the substratum (Ref. 36880).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Bussing, W.A., 1996. Sicydium adelum, a new species of gobiid fish (Pisces: Gobiidae) from atlantic slope streams of Costa Rica. Revista de Biologia Tropical 44(2):819-825. (Ref. 38402)
IUCN Red List Status (Ref. 124695)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [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
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (30 of 100) .