Crown of Thorns starfish (Acanthaster planci) are voracious little predators. They preferable feed on stony corals, and when many of them come together, they can denude entire reefs of coral. Spiky and venomous, they have very few natural enemies. But these echinoderms fulfill a very important function in a reef-ecosystem: as they prefer to eat fast growing corals like Acropora, they create space for the slower growing ones. And that is great news for the diversity of a reef.

The guy filmed here seems to have gotten into a wrestling match with a sea-urchin.┬áIt probably has it’s reasons.


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About the Oceans

Ocean Reality

Ocean Reality


Ocean Reality is a not for profit Video Production and Facebook community, dedicated to preserve this planets delicate and wonderful Oceans. By creating awareness through images, videos and articles, Ocean Reality hopes to create change in peoples minds and behavior. Our Oceans need it. Desperately.