Green Sea Urchin (Strongylocentrotus droebachiensis) A close up of a Green Urchin photographed while scuba diving in British Columbia, Canada. Often harvested for uni ...

The turquoise water of Hōnaunau Bay in Hawaii, an area popular with snorkelers and divers, is teeming with spiny creatures that threaten to push the coral reef “past the point of recovery,” new ...

This study measured the growth rate of coral reefs in Honaunau Bay, Hawaii, using on-site data gathering and aerial imagery. Researchers found that the reefs are being eroded by sea urchin populations ...

New research has uncovered a crucial clue to understanding the spread of "barrens" in the Great Southern Reef, which are threatening the reef ecosystem. "Barrens" are areas of low, or no, seaweed ...

Scientists are trying to raise as many urchins as possible because they eat algae that could otherwise smother reef ecosystems and kill corals. Researchers have identified algae on which larval sea ...

The long-spined sea urchin (Diadema antillarum) is a key algae grazer in the Caribbean. A disease outbreak in the 1980s killed off most of the urchins, resulting in the overgrowth of many Caribbean ...

Research team: “This is an extremely violent global pandemic. The Caribbean, Red Sea, and the Indian Ocean are critical regions for the world’s coral reefs, and mortality rates for sea urchins in ...