Occurred on May 1, 2016 / Lembeh, Sulawesi, Indonesia Info from Licensor: "The crab was running with a fancy sea urchin on it. The sea urchins have spines, which may be a good defense.

Sea urchin stings aren’t usually fatal, but they are dangerous. You should be aware of the symptoms and treatments so you can get professional help if you need it. Symptoms.

A mysterious sea urchin plague has spread across the world, causing the near extinction of the creature in some areas and threatening delicate coral reef ecosystems, a new study suggests.

Sea urchin eggs specifically secrete a compound called a sperm-activating peptide, which interacts with the sperm’s flagellum, controlling how it beats. This curves and bends the sperm’s ...

The black sea urchin is critical to maintaining a healthy reef habitat. Without them, algae grow unchecked, choking off corals and compromising the delicate balance of the reef ecosystem.

Sea Urchin Harvest is run out of Moruya, on the far south coast of NSW. (ABC South East NSW: James Tugwell) "You've got to have A-grade, really high-quality market produce.