The Family Characidae is a group of fish found in freshwater habitats across Latin America. These small fish are characterized by their typically elongated body shape and small size. Synonyms for Family Characidae include the Characin family, the tetra family, and the characid family. These names reflect the family's most well-known members, including the popular aquarium tetras, like neon tetras and cardinal tetras. But the Characin family is diverse, and includes many other fascinating species, such as the pencilfish, hatchetfish, and the piranha. While some Characidae species are popular in the aquarium trade, others are important commercially or ecologically in their native habitats.