A global citizen science platform
to discover, share and identify wildlife
Crown of Thorns starfish are natural predators of coral. One individual can eat 13 m2 of coral a year. Their populations have natural blooms and crashes , and are thought to be beneficial for maintaining coral diversity. But over recent years blooms have been huge and have decimated many a reef.
The crown-of-thorns receives its name from venomous thorn-like spines that cover its body.