Actinopteri (ray-finned fishes) > Siluriformes
(Catfishes) > Akysidae
(Stream catfishes) > Akysinae
Etymology: Akysis: Derived from Greek, a = without + Greek, kysthos = bladder (Ref. 45335); maculipinnis: The specific name is derived from the Latin macula (spot) and pinna (fin), referring to the speckled fins. More on author: Fowler.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic. Tropical
Asia: Mekong and Chao Phrya (Thailand) basins as well as basins around the upper Gulf of Thailand.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 3.1 cm SL male/unsexed; (Ref. 30226)
soft rays: 8 - 10;
Vertebrae: 31 - 32. Distinguished from all its congeners by the following combination of characters: head length 22.0-28.6% SL; depth of caudal peduncle 8.8-10.7% SL; length of anal-fin base 15.2-19.1% SL; eye diameter 12-16% HL; length of nasal barbel 57-92% HL; 3-4 serrae on the posterior edge of the pectoral spine; and caudal fin emarginate (Ref. 30226).
Inhabits large muddy river channels. Not seen in the markets (Ref. 12693).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Rainboth, W.J., 1996. Fishes of the Cambodian Mekong. FAO species identification field guide for fishery purposes. FAO, Rome, 265 p. (Ref. 12693)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
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=0.00389 (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
): 3.3 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months ().
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .