Clown shrimp, Harlequin shrimp

These shrimps naturally occur on coral reefs in the tropical Pacific (particularly around Hawaii) and Indian Oceans. In the wild they are often found in pairs, and many sources state that they mate for life. The female of this species is usually slightly larger than the male, and can be identified by the blue tips on the abdominal legs while males generally have transparent legs. This shrimp's maximum size is around 5.5cm (2"), although specimens collected from the Indian Ocean are typically smaller - usually reaching a maximum size of around 2.2cm (1").