Sea urchins are sphere-shaped or flat creatures that live in the ocean and are completely covered in protective spines. On the tips of these spines are tiny claw-like pincers called pedicellariae.‌ ...

Across tropical and subtropical seas, a quiet biological crisis is unfolding as vast populations of reef‑grazing sea urchins ...

Sea urchins are small ocean creatures found around the world. They are covered in spikes and have a painful sting if you bump or step on one. Stings are often red and swollen and may cause serious ...

The sunflower sea star (Pycnopodia helianthoides) can be found throughout intertidal and subtidal coastal waters of the northeast Pacific Ocean, from Alaska to at least northern Baja California, ...

Every summer, millions of people head to the coast to soak up the sun and play in the waves. But they aren’t alone. Just beyond the crashing surf, hundreds of millions of tiny sea urchin larvae are ...

Sea urchin is a delicacy in Asia, South America, Europe, and increasingly in California, where the uniquely flavored roe, or uni, is used in sushi, gourmet cuisine, and products such as sauces and ...

Sunlight streaming through a forest of giant kelp, Macrocystis pyrifera, off Catalina Island, California, USA. (Photo by: David Fleetham/VW PICS/Universal Images Group via Getty Images) Scuba divers ...

Every summer, millions of people head to the coast to soak up the sun and play in the waves. But they aren’t alone. Just beyond the crashing surf, hundreds of millions of tiny sea urchin larvae are ...