If you are overturning rubble in a shallow Indo-Pacific lagoon at low tide, you may be lucky enough to spot the Superb Brittle Star (*Ophiolepis superba*). Often called the "Marbled Brittle Star," this echinoderm is a master of graphic design.
Identification
The most striking field mark is the central, pentagonal disk—roughly the size of a large coin—which features a bold, chocolate-brown star pattern set against a cream or tan background. From this disk extend five thick, tapered arms that can reach 6 inches (15 cm) in length. These arms are distinctly banded with alternating dark brown and light beige rings. Unlike the "hairy" brittle stars, *O. superba* has a smooth, plated appearance, with large, shield-like scales that give it a polished, ceramic texture.
Habitat & Range
This species is a staple of the Indo-Pacific, ranging from the Red Sea and East Africa all the way to the islands of French Polynesia. You’ll find them in shallow tropical waters, typically tucked into the "rubble zone" of coral reefs or hiding beneath large coral heads and rocks in sandy-bottomed lagoons. They rarely venture into deep water, preferring the nutrient-rich shallows.
Behaviour
*O. superba* is intensely photophobic and nocturnal. During the day, an observer might only see a single banded arm protruding from a crevice. When exposed, they move with a surprising, serpentine grace. Unlike common sea stars that use tube feet to "glide," brittle stars use their highly flexible arms to "row" or heave themselves across the substrate.
Diet
These are the janitors of the reef. As detritivores and scavengers, they use their arms to sweep the sand for organic debris, fallen fish food, and micro-algae. They are peaceful inhabitants, unlike some of their predatory cousins, making them a favorite for reef aquarists.
Fascinating Fact
The Superb Brittle Star practices "autotomy"—the ability to voluntarily "cast off" an arm if it is seized by a predator. Even more incredible, the severed arm will often twitch violently for several minutes, distracting the attacker while the star escapes. Within weeks, a perfectly formed new arm begins to sprout from the stump!