Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopteri (ray-finned fishes) > Cypriniformes
(Carps) > Gastromyzontidae
Etymology: crassicauda: From the Latin crassus (thick) and cauda (tail), allusion to the stout caudal peduncle. More on author: Kottelat.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic. Tropical
Asia: Nam Xam and Nam Ma basins in Laos. Expected to occur in Viet Nam.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 6.7 cm SL male/unsexed; (Ref. 43281)
Morphology | Morphometrics
Caudal peduncle 1.2-1.5 times longer than deep, depth 9.3-10.7 %SL; anus closer to posterior extremity of pelvic-fin base than to caudal-fin origin; 12-16 black bars on body, their width about equal to eye diameter, quite regularly shaped and spaced in individuals larger than about 50 mm SL, less regular in smaller ones; juvenile with 3 broad black bars on body and a large black blotch on anterior half of caudal fin; 7-8 narrow saddles along back; pelvic, pectoral and anal fins plain colored, bright orange in life; 2 broad black stripes or row of spots on dorsal, 3 black bars or rows of spots on caudal fin; 15-16 branched pectoral-fin rays; 9 branched pelvic-fin rays (Ref. 36949).
Occurs in rapids, torrents and waterfalls (Ref. 36949).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Kottelat, M., 2001. Fishes of Laos. WHT Publications Ltd., Colombo 5, Sri Lanka. 198 p. (Ref. 43281)
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
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00447 (0.00172 - 0.01158), b=3.14 (2.91 - 3.37), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 2.7 ±0.2 se; based on size and trophs of closest relatives
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .