Sei whales reappear in Argentine waters after nearly 100 years
Sei whales are back in Argentina’s coastal waters for the first time in roughly 100 years, after industrial whaling wiped them out in the 1920s and 30s. These blue-grey giants are the third-largest whales on Earth and among the fastest, which once made them prime targets for hunters. Their slow return — the species reproduces just once every two or three years — is a quiet testament to the 1946 international whaling treaty that gave them room to rebuild. Global numbers now sit around 50,000 and are trending upward, though sei whales remain endangered. Their reappearance off Patagonia carries a hopeful lesson for marine conservation everywhere: give a species enough time and enough protection, and it can find its way home.









