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Characins

Characins are a widespread group of fish. They include tetras, pirahna, hatchet fish, and Pacu. They range from extreme carnivores to peaceful herbivores.

Common Characteristics: 
Food: Varies between Carnivore and Herbivore again. Pacus eat mostly vegetation, and Pirahna eat meat, preferably moving meat. Check with specific species again.
Breeding: All are egg-layers with little of no brood care. Some are very particular about water conditions for spawning, while others are not.
Water Parameters: Most like soft acidic water, though there are some exceptions. Also most are tropical with a few preferring cooler water.
Temperament: Most Tetras are nearly all schooling fish who like the company of their own kind, and are overall not aggressive.
Origins: South America and a few Africans. Congo Tetras being the notable African species.
A Few Exceptions: Pacu: Can grow absolutely huge, and loves plants and vegetables. Their huge size, often 14 inches makes them difficult to care for.

Pirahna: For obvious reasons. They are larger, only really comfortable in a shoal, and often a very nervous species. They also do nothing when not feeding. They are also illegal in many US states.

Link to Characin Species Profiles

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Examples of Characins:

Click images for species information:

Buenos Aires Tetra Picture Hemigrammus caudovittatus

Bleeding heart Tetra Picture Hyphessobrycon eryhrostigma

Penguin Fish Picture Thayeria boehlkei

Silver Hatchetfish Picture Gasteropelecus sternicla

Cardinal Tetra Picture Paracheirodon axelrodi

Copenia guttata Picture Copeina guttata

Moenkhausia pitteri pic Moenkhausia pitteri