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HEART URCHIN (Tripneustes gratilla)
Biodiversity > Marine Life > Echinoderm > Sea urchins

Shady urchin

The Shady urchin Tripneustes gratilla has fine white spines and it derives its name from the habit of covering itself with pieces of rubble, shells and weed. Perhaps this is a camouflage against predation from birds, or protection from the sun. When it dies, it leaves behind a beautiful mauve coloured skeleton. Uncommon except on the rock platform at Middle Beach, and a few are found at North or South Reef.


Size: 12cm 

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