Hawai'i's last false killer whales threatened by nutritional stress and warming seas

A seven-year collaborative study has revealed alarming fluctuations in the health of Hawaii's endangered insular false killer whales, with some individuals losing nearly a quarter of their body weight in just a few months. Published in Endangered Species Research, the findings provide the first quantitative evidence that nutritional stress and environmental shifts may be driving the decline of this iconic population, which now numbers fewer than 140 individuals.