Actinopteri (ray-finned fishes) > Siluriformes
(Catfishes) > Akysidae
(Stream catfishes) > Parakysinae
Etymology: Parakysis: Greek, para = the side of + Greek, kysthos = bladder (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal; depth range - m (Ref. ), usually - m (Ref. ). Tropical; 0°C -
Asia: Singapore, Peninsular Malaysia and Indonesia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 4.6 cm SL male/unsexed; (Ref. 13847)
Occurs from clumps of vegetation in streams with flowing waters. Sympatric with P. verruisus. Nocturnal (Ref. 13847). Recorded from fast-flowing, well shaded swamp-forest streams with acidic waters, and dense growth of submerged vegetation. Feeds on minute invertebrates and uses its dexterous and strong pelvic fins to move about (Ref. 85309).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Ng, H.H. and K.K.P. Lim, 1995. A revision of the Southeast Asian catfish genus Parakysis (Teleostei: Akysidae), with descriptions of two new species. Ichthyol. Explor. Freshwat. 6(3):255-266. (Ref. 13847)
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
= 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.5 ±0.6 se; based on size and trophs of closest relatives
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .