Orange Spine Urchin Tripneustes gratilla

The Orange Spine Urchin is sometimes called Collector Urchin as debris tends to collect on them (or they collect it for camouflage). It is native to the Indo-Pacific Oceans. It has a dark body colour with orange and white spines and grows to 10-15cm round. They graze day and night on seagrass and algae.