it might be a marble sea star Marble Sea Star
(Fromia sp.)
Quick Stats
Care Level: Moderate
Tank Conditions: 72-78°F; sg 1.023-1.025; pH 8.1-8.4; dKH 8-12
Max. Size In Aquarium: Up to 3"
Color Form: Bright Red, Cream, Orange
Temperament: Peaceful
Reef Compatible: Yes
Diet: Omnivore
Origin: Indo-Pacific
Family: Ophidiasteridae
The Marble Sea Star, or Marble Starfish, is one of the more common of the Fromia species, its coloration making it one of the more striking of all the sea stars. Its central disc will have an orange to deep red color, while its arms have cream-colored spots with a red edging.
It is found over sandy substrates, on rocks, and sometimes climbing on anemones. It is constantly foraging for micro-organisms and detritus to eat, so the aquarium should have ample amounts of live rock. It generally lives alone, but if the aquarium is large enough to support more than one, it will tolerate others of its own species.
It is intolerant of copper-based medications and high levels of nitrate, and is very sensitive to changes in specific gravity, temperature, salinity and pH of the water, and oxygen levels. Avoid exposing the Marble Sea Star to air or sudden salinity changes, as this is detrimental to its health, often resulting in bacterial infections and necrosis of an arm, or possible death.
It is extremely difficult to breed in an aquarium, with no distinguishing characteristics to help differentiate it from its mate.
It is recommended to supplement its diet with small pieces of shrimp, mussel, or flaked food.