Teleostei (teleosts) >
Characiformes (Characins) >
Serrasalmidae (Piranhas and pacus) > Serrasalminae
Etymology: Metynnis: Greek, meta = with, after + Greek, ynnis, -eos = ploughshare (Ref. 45335).
More on authors: Müller & Troschel.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; pelagic; pH range: 6.0 - 7.0; dH range: ? - 10. Tropical; 24°C - 28°C (Ref. 1672)
South America: Amazon and Paraguay River basins, north Guiana Shield rivers.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 18.0 cm SL male/unsexed; (Ref. 96599); max. published weight: 0.00 g
Possesses powerful dentition that can cause serious bites.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Often spawns in schools, preferable near the surface. Does not eat its eggs, which hatch after 3 days.
Zarske, A. and J. Géry, 1999. Revision der neotropischen Gattung Metynnis Cope, 1878. 1. Evaluation der Typusexemplare der nominellen Arten (Teleostei: Characiformes: Serrasalmidae). Zool. Abh. Mus. Tierk. Dresden 50(13):169-216. (Ref. 34077)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Harmless
Human uses
Fisheries: minor commercial; aquarium: commercial
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