Considered a delicacy in several parts of the world, sea urchin, or uni in Japanese, is prized for its unique flavor. But the cost of the gonads — the orange tongues found inside an urchin ...

For years the sea urchin's key predator was believed to be lobsters due to the crustacean's appendages being able to manipulate the spiky urchins to get inside. However the discovery that sharks ...

Sea urchin populations began to explode off the ... are retained within kelp beds because tides and currents are weaker inside these areas than outside, Hildebrand said. The study highlights ...