This report details marine mammal stranding rates, trends, and activities in the United States for both 2020 and 2021. In 2020, there were 5,400 confirmed marine mammal strandings; in 2021, there were 5,524.
Our data show harbor porpoise comeback and last chance for endangered turtles. Read more in this leadership message from Science and Research Director for the Southwest Fisheries Science Center Kristen Koch.