After completing a necropsy on the female whale the Marine Mammal Stranding Center said the wounds included a fractured skull, bruising on the head, and cuts on the whale's right side, which were likely caused by a propeller strike.

Source: https://nj1015.com/wind-development-to-blame-for-whale-deaths-nj-issues-statement/

Plastics—A necropsy on a dead sperm whale in Nova Scotia in November found 330 pounds of plastic inside the whale's stomach, the Marine Animal Response Society reported.

Source: https://phys.org/news/2023-01-feds-whale-mystery-dozen-dead.html

Yudiarso said it would take at least three weeks for the necropsy test to be concluded but forensic experts found some bleeding in the whale's lungs and its colon was filled with fluids.

Source: https://phys.org/news/2023-04-massive-whale-month-beaches-dies.html