Harlequin Rasbora

The harlequin rasbora is a freshwater fish known for its unique color patterns and schooling behavior. They reach a max size of 1.75" and can go into almost any size aquarium, but because they are schooling fish, you need a minimum of 10 gallons with a group of no less than 6. The larger the school of Rasboras you have, the more vibrant and social they will be.