This group of freshwater fish
is one of the largest and most diverse, containing over 1300 species. Most are found in the Americas
, with the rest mainly in Africa
. They are noted for having teeth
, having an adipose fin
, and being egg-scatterers. Most Characins are omnivorous
, although some are herbivorous
Tetras, the popular aquarium fish, are a member of this group, as are Piranhas. Other members include hatchetfish and pencilfish.