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Latin namePsammechinus miliaris
Size – Up to 5cm diameter
Habitat – Mid and lower shore

Sea urchins have a hard spiny skeleton which helps to protect them from predators. Amongst the spines are tiny tube feet which the animal uses to move around. Its mouth is located on the underside of the creature and it has 5 large teeth, which it uses to graze on plants like algae. These teeth make up the Sea urchin’s jaw which is known as Aristotle’s lantern. Sea urchins are a close relative of starfish.

Green Sea Urchin

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Sea urchins have hard spines covering their body which protects them from predators. They are related to starfish. Photo by Hans Hillewaert.

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