Choriaster granulatus

Choriaster is monotypic genus in the family Oreasteridae containing the single species Choriaster granulatus commonly known as the granulated sea star. Other common names include big-plated sea star and doughboy starfish. This species is harmless to humans. Choriaster granulatus is a large sea star with a convex body and five short arms. The maximum growth radius is about 27 cm. It is a pale pink color with brown papillae in the center. This species is found in numerous tropical waters, including: Choriaster granulatus prefers shallow waters, having a depth range of 1.5 – 53 m deep. The water temperature is above average, ranging from 24-29 °C. Choriaster granulatus has been found individually or in groups in the Indo-West Pacific region along coral reefs. It has also been found in the Red Sea, Fiji, and Great Barrier Reef. The sandy habitat is characterized by rubble slopes and detritus and they have been found among corals and sponges. Choriaster granulatus is a carnivore and has its mouth on the underside of its body, like other sea stars. Their prey is absorbed outside their mouths by forcing out their digestive organs from their stomach. It's prey include carrion and small invertebrates such as coral polyps. Embryos hatch into planktonic larvae before becoming juveniles with five arms. These juveniles will grow up to be sea stars with stubby arms. The Asteroidea class of organisms use both asexual and sexual means of reproduction. The arms of Choriaster granulatus can become deformed when small parasitic limpets attach to the underside of the arms.