Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Characiformes
(Characins) > Serrasalmidae
Etymology: Colossoma: Greek, kolos = short, truncated + Greek, soma = body (Ref. 45335).
Environment / Climate / Range
Freshwater; benthopelagic; pH range: 5.0 - 7.8; dH range: ? - 20; potamodromous (Ref. 51243); depth range 5 - ? m. Tropical; 22°C - 28°C (Ref. 1672), preferred ?; 15°S - 35°S
South America: Amazon and Orinoco basins as wild form; pisciculture form largely distributed in South America.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 108 cm TL male/unsexed; (Ref. 40637); common length : 70.0 cm TL male/unsexed; (Ref. 9987); max. published weight: 40.0 kg (Ref. 72380)
This species is usually solitary. Adults stay in flooded forests during first 5 months of flooding and consume but fruits and grains. Young and juveniles live in black waters of flood plains until their sexual maturity. Feeds on zooplankton, insects, snails and decaying plants (Ref. 32894). Used in aquaculture because it can live in mineral poor waters and is very resistant to diseases. Marketed fresh and frozen (Ref. 9987).
Géry, J., 1977. Characoids of the world. Neptune City ; Reigate : T.F.H. [etc.]; 672 p. : ill. (chiefly col.) ; 23 cm. (Ref. 598)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
Fisheries: minor commercial; aquaculture: commercial; aquarium: public aquariums
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01820 (0.00937 - 0.03533), b=3.05 (2.87 - 3.23), based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic Level (Ref. 69278
): 2.0 ±0.0 se; Based on diet studies.
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.23; Fec=7,000-300,000).
Vulnerability (Ref. 59153
): Moderate to high vulnerability (47 of 100) .