
Maroon Clownfish
The characteristic that defines this genus is the spine on the cheek. Only some females have a maroon body color, with a range of color to dark brown. Juveniles and males are bright red-orange. The fish has three body bars which may be white, grey or yellow. Where the female bars are grey, they can be "switched" rapidly to white if fish is provoked. As other anemone fishes it is a sequential hermaphrodite with a strict sized based dominance hierarchy: the female is largest, the breeding male is second largest, and the male non-breeders get progressively smaller as the hierarchy descends. They exhibit protandry, meaning the breeding male will change to female if the sole breeding female dies, with the largest non-breeder becomes the breeding male
Habitat:
Shallow coral reef in the shoreline of Lankayan, Sabah.

''Premnas biaculeatus'', commonly known as spine-cheeked anemonefish or the maroon clownfish, is a species of anemonefish that is found in the Indo-Pacific from western Indonesia to Taiwan and the Great Barrier Reef. Like all anemonefishes it forms a symbiotic mutualism with sea anemones and is unaffected by the stinging tentacles of the host anemone.