The Ocellaris Clownfish, Common Clownfish or False Percula Clownfish (Amphiprion ocellaris) is a popular aquarium fish, even more so after it rose to stardom in Finding Nemo. It is very closely related to A. percula, the Orange Clownfish or “True Percula Clownfish”, and often lives in association with the sea anemone Heteractis magnifica, using them for shelter and protection. Generally, Ocellaris clownfish are hardier, and slightly less aggressive than its Percula counterpart. Both species are found in coral reefs of the Indo-Pacific, particularly in the Fiji and Tonga regions.
This clown anemonefish can be recognised by its orange colour with three white bars and black markings on the fins. It grows to about eight centimeters (three inches) in length. One can differentiate between Percula (true) and Ocellaris (false) by their respective colors and patterns. Ocellaris are usually less vibrantly colored, and have 11 dorsal fin-spines instead of 10, as on the Percula. There is also a rare melanistic variety hailing from the reefs around Darwin, Australia, that is a dark black colour with the normal white stripes. (text source: Wikipedia)