Helmet Urchin (Colobocentrotus atratus)
The urchin usually lives on substrates that are fully exposed to the action of waves. Its smoothed, flattened spikes and strengthened tube feet are adaptations for its environment.
Ken-ichi Ueda on Flickr

Helmet Urchin (Colobocentrotus atratus)

The urchin usually lives on substrates that are fully exposed to the action of waves. Its smoothed, flattened spikes and strengthened tube feet are adaptations for its environment.

Ken-ichi Ueda on Flickr

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