At least 18% of gray whales documented in San Francisco Bay between 2018 and 2025 later died there. Ship strikes are the leading cause and the population isn’t rebounding as it once did.

Two marine biologists explain why this isn’t normal:
https://theconversation.com/gray-whales-are-dying-in-san-francisco-bay-at-an-alarming-rate-this-isnt-normal-280151

Gray whales are dying in San Francisco Bay at an alarming rate – this isn’t normal

In the past, the gray whale population recovered fairly quickly. But data on baby whales show that isn’t happening, and a new study finds an alarmingly high mortality rate.

The Conversation