Sea Urchins (Diadematidae)
Double Spined Sea Urchin, Banded Sea Urchin, Banded Urchin, Fire Urchin, False Fire Urchin, Long-spined Sea Urchin, Long-spine Banded Sea Urchin, Star Urchin, Stripe-spined Urchin, White Spined Needle Urchin, Hatpin Urchin.
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Also known as Double Spined Sea Urchin, Banded Sea Urchin, Banded Urchin, Fire Urchin, False Fire Urchin, Long-spined Sea Urchin, Long-spine Banded Sea Urchin, Star Urchin, Stripe-spined Urchin, White Spined Needle Urchin and Hatpin Urchin.
Found in large groups moving across the sand and rubble in bays and lagoons.
They feed on invertebrates, sponges and even dead fish.
Length - 25cm
Depth - 0-15m
These large sea urchin with long and mobile spines can often be found with fish and shrimps swimming in between their spines for protection.
Sea Urchins use tubed feet to get around, often in large impenetrable masses for protection.
Sometimes they hitch a lift on the back of crabs.
They have well developed jaws for grinding their prey.
Their anus is on top in most sea urchins, except the heart urchins where it is at the rear.
Predators of sea urchins are triggerfish and large wrasses, who nibble away at their spines before turning them over to eat the fleshy undersides.
Sea Urchins are highly venomous and can pierce through a wet-suit.
Some are sensitive to light and have the ability to shoot venom loaded spines at a short distance.
They are to be avoided!! (edit)
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