Green sea urchin
This small, round sea urchin is (unsurprisingly!) green in colour and can be found on rocky shores around the UK.
This small, round sea urchin is (unsurprisingly!) green in colour and can be found on rocky shores around the UK.
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This large round urchin is sometimes found in rockpools, recognisable by its pink spiky shell (known as a test).
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Sea potatoes may have a funny name, but they are perfectly adapted for life in the sand. They are a type of sea urchin that live in a burrow in the sand, feeding on dead animals and plants using…