Scientific Name: Asterina spp.
Identification: A small (under 1" across) off-white, light brown, or mottled starfish, with short, wide legs for its body size.
Asterina Starfish
This small star may be one of several species that hitchhikes into our tanks (Class: Astroidea). They are probably harmless algal grazers and detritivores, however, they should be watched carefully as many starfish are coral predators. They may have as few as 2 to as many as 6 fully formed arms. They commonly emerge from shelter at night.
Pest Management
Treatment: Harlequin Shrimp eat Asterina (as well as every other starfish), so use with caution. The easiest way to remove these pests is to simply pick them out
Prevention: Carefully examine any new piece of rock or coral before adding to your tank, and remove any unwanted pests.