The rare Guadalupe fur seal, once hunted nearly to extinction, is falling victim to a new and deadly culprit — the unusually warm ocean waters off the West Coast.

The pinnipeds, which are listed as threatened under the U.S. Endangered Species Act, have been washing ashore in such unprecedented numbers that fisheries experts with the National Oceanographic and Atmospheric Administration declared what they call an “unusual mortality event.”

Continue reading:  Scientists raise alarm over seal deaths off California coast