Rasboras are the schooling jewels of small aquariums. LIke tetra, these fish swim in large schools in the wild. A few, such as harlequin and scissortail rasboras, get large enough for larger species community tanks. Most look best in small planted aquariums and they get along with fancy shrimp and other gentle tank mates.
Tetras come from South American – and a few from Africa, and barbs and rasboras come from Asia and the South Pacific islands.