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 — is steep.

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 — is steep.

It's very hard to kill a purple sea urchin. Starve it for years, and it will fall dormant on the ocean floor, devoid of any flesh — just an empty, spiky shell awaiting its next meal. They're like the ...

What you can see in this YouTube clip is very different from most of the underwater footage that you will come across online. It features a diver picking up sea urchins using a metal tool and breaking ...

The pointy shell of sea urchins hides a remarkably complex neural network that resembles the brains of vertebrates, new research suggests.

Researchers grew juvenile sea urchins from Northern and Southern California in outdoor tanks at UCSC’s Long Marine Laboratory, where they could control the conditions in each tank. (Photo by Kate ...