The Caribbean, Red Sea, and the Indian Ocean are critical regions for the world's coral reefs, and mortality rates for sea urchins in these areas are very high—over 90 percent.

Southern sea otters typically eat clams, mussels and sea urchins—and, since they lack blubber, they have to eat a lot to stay warm. But within the reserve, they’ve been happily foregoing these ...

Despite their low numbers, sea otters consume voracious kelp-eating sea urchins at a high enough rate that kelp forests continue to persist and provide habitat for numerous species. Without sea ...

Sea urchins can appear to be beautiful quilled shells to some and may make the mistake of grabbing one. If you’ve ever stepped on or caught one, you will remember it forever. A sting from the ...