Wimple Piranha Care Guide
Catoprion mento is a small serrasalmid specialised as a scale-eater (lepidophage), with a distinctive underbite for stripping scales from other fish.
Compiled by Aquairi from published sources · Published · Updated
Overview
Catoprion mento, the wimple piranha, is a small serrasalmid and the type species of its genus, described originally by Cuvier in 1819. It is a specialised scale-eater that uses powerful dentition and a pronounced underbite to strip scales from other fish.
Taxonomy
- Family: Serrasalmidae
- Genus: Catoprion
- Scientific name: Catoprion mento
- Order: Characiformes
Habitat
The species ranges across the Amazon, Orinoco, Essequibo and upper Paraguay River basins in tropical South America. FishBase describes it as a freshwater, pelagic fish of acidic waters.
Tank requirements
- Minimum tank volume: 250 L
- Temperature: 24-28 °C (75-82 °F)
- pH: 5.5-7.0
- GH: 2-10 °dGH
- Lifespan: 5-10 years
Diet
Catoprion mento is a carnivore with a specialised lepidophagous (scale-eating) habit, observed feeding on the scales of other fish. FishBase places it at a trophic level around 3.2. Its powerful dentition can inflict serious bites.
Compatibility
Because it strips scales from tankmates, this aggressive middle-water fish is incompatible with other species and is best kept alone. Mixing with any other fish should be avoided.
Conservation status
IUCN Red List: Least Concern. FishBase notes high resilience with a population doubling time of less than 15 months.
Wimple Piranha (Catoprion mento) Breeding Guide
Overview
Catoprion mento, the wimple piranha, is a serrasalmid recorded from Colombia, Venezuela, Guyana, Brazil and Bolivia, including Pantanal wetlands. According to Seriously Fish it reaches about 15 cm (usually a little smaller) and is a scale-eating specialist that feeds largely on the scales of conspecifics and other fish in nature, using specially adapted teeth. Its reproduction in aquaria is unreported.
Sexing
Seriously Fish reports that males display a clearly convex anal fin, while the female does not. This is the only documented external sexing cue for the species.
Conditioning
In captivity most specimens accept chopped prawn, mussel, lancefish and other meaty foods rather than live fish. Seriously Fish stresses that the species is sensitive both to poor water quality and to uneven swings in chemistry, so small regular water changes are preferred over occasional large ones.
Breeding Setup
No documented spawning protocol exists. Seriously Fish lists keeping parameters of 23-26 C, pH 5.8-6.5 and hardness 1-5 dH, with the fish coming from rivers, streams, tributaries and Pantanal wetlands; soft, slightly acidic and very stable water would be the logical baseline for any attempt.
Spawning Behavior & Trigger
Spawning behavior, eggs and fry rearing are unreported for Catoprion mento in the consulted sources, so no trigger or egg-care protocol can be stated reliably.
Common Challenges
The scale-eating diet and aggressive disposition complicate keeping conspecifics together, and the species' sensitivity to chemistry swings raises the difficulty further. Combined with the absence of any documented spawning, home breeding remains effectively unestablished.