IUCN threat status:

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WhyReef - Lifestyle

Like the sea star, the long-spine sea urchin is an echinoderm, which means “spiny skin”.

It uses hundreds of flexible, straw-like tube feet to move around, eat and breathe.

Its hollow, hooked spines protect it by breaking off and stabbing anything that tries to touch it. These spines are very painful and difficult to remove.


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