This unique starfish is also known as the Icon Sea Star. Its name comes from the 5 sided star that adorns its back. This “second star” is generally a contrasting colour to the rest of its body. Its colours range from off white to orange to tan, with the starshaped patterning on its back generally of a darker colour. It has a classic starfish shape with 5 arms radiating from its body. This starfish generally grows to a maximum size of about 4 inches.
The Double Sea Star can be found in the warm waters of Southeast Asia. It is most often found in the deeper parts of coral reefs where it spends its time scavenging for microorganisms and detritus. It is equally at home on both live rock and substrate. Unlike serpent sea stars, it does not actively hunt prey. In a home aquarium they require both ample live rock as well as a substrate. This will provide them with enough food to remain healthy. They generally live alone in the wild but in a larger tank will often tolerate one other member of the same species.
This starfish is completely reef safe and will not harm any corals, fish or invertebrates. The Double Sea Star is a true omnivore and will scour the live rock and substrate for leftover food and detritus. While it does not actively eat cyanobacteria or diatoms it will turn over the sandbed in its search for other foods which can prevent outbreaks of these.