Topic: Environment

Gray whales are migrating to San Francisco Bay due to climate change. Unfortunately, many of them don't survive, with some being struck by boats and others starving.

Gray whales are known for their long migration between food-rich Arctic waters and the warm lagoons of Baja Mexico. However, as climate change alters ocean conditions, some whales are behaving in unexpected ways. In recent years, a number of gray whales have been spotted feeding in unfamiliar areas, including the heavily trafficked waters of San Francisco Bay.

Researchers studying an unusually high number of whale deaths found that nearly 20% of the gray whales seen entering the Bay did not survive, with many killed by boat strikes. The researchers believe that the Bay may act as an emergency feeding stop for whales in poor condition, as unusually thin individuals have been observed foraging in other nontraditional habitats as well.

Despite using the Bay as a potential feeding refuge, many whales do not survive. Between 2018 and 2025, 70 gray whales were found dead in the surrounding region. Of those, 30 were confirmed to have been struck by vessels. Among the remaining whales where a cause of death could be determined, many showed signs of malnutrition.

Scientists emphasize the need for more research to better understand how and why whales are using the Bay. In 2025 alone, 36 whales entered the area, with groups sometimes exceeding 10 individuals.

Why It Matters

As climate change continues to affect our planet, understanding how marine life adapts is crucial. This study highlights the importance of protecting gray whales and their habitats, which can have a ripple effect on the entire ecosystem.

Key Facts

• Gray whales are migrating to San Francisco Bay due to climate change.
• Nearly 20% of the gray whales seen entering the Bay did not survive.
• 30 gray whales were confirmed to have been struck by vessels between 2018 and 2025.
• Many gray whales showed signs of malnutrition in the study period.
• The researchers believe that the Bay may act as an emergency feeding stop for whales in poor condition.

Key Terms

Vessel strike

When a boat hits and kills a whale

Implications

As climate change continues to affect our planet, understanding how marine life adapts is crucial. This study highlights the importance of protecting gray whales and their habitats, which can have a ripple effect on the entire ecosystem.