Actinopteri (ray-finned fishes) > Characiformes
(Characins) > Cynodontidae
Etymology: Hydrolycus: Greek, hydr = water + Greek, lykos = wolf (Ref. 45335). More on author: Cuvier.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic; depth range - m (Ref. ), usually - m (Ref. ). Tropical; 24°C - 28°C (Ref. 12468)
South America: Amazon River basin.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 117 cm TL male/unsexed; (Ref. 40637); max. published weight: 17.8 kg (Ref. 40637)
Apparently carnivorous, probably ichthyophagous. Maximum length reported to reach 40 cm TL (Ref. 12468).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Toledo-Piza, M., 2003. Cynodontidae (Cynodotids). p. 234-237. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 38270)
IUCN Red List Status (Ref. 124695)
Threat to humans
Fisheries: minor commercial; gamefish: yes; aquarium: public aquariums
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5664 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00603 (0.00315 - 0.01154), b=3.20 (3.03 - 3.37), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic level (Ref. 69278
): 4.5 ±0.5 se; based on diet studies.
Vulnerability (Ref. 59153
): Moderate to high vulnerability (51 of 100) .