July 9, 2019 — The past year and a half has been harrowing for the world’s largest mammals, as an unusual number of gray whales have stranded on West Coast beaches this year, following excessive whale entanglements in 2018.
Gray whales have been washing ashore with alarming regularity, particularly in the San Francisco area and the Los Angeles and Long Beach Harbors, but also at some beaches in San Diego.
On March 29, San Diego lifeguards found a 30-foot-long dead whale off the shore near Mission Beach, just a day after another whale carcass was towed away from the coast off Torrey Pines.
As of June 27, a total of 171 whales have stranded on West Coast beaches off North America, with 85 of those turning up on the U.S. coastline and 37 beaching in California alone. Since most whales that die either sink or float out to sea, the beached whales represent just about 10 percent of total mortalities.
Gray whale deaths hit a peak in May, and continued through June. With whale carcasses drifting on shore, the National Oceanic and Atmospheric Administration on May 31 declared an “unusual mortality event,” which triggers heightened investigation and response to the strandings.