Did you know that a blue whale skeleton at the New Bedford Whaling Museum has been leaking oil for 26 years? The massive 66-foot-long skeleton, named King of the Blue Ocean (KOBO), is still releasing oil due to its oily bone marrow. This phenomenon is a result of the natural energy reserve stored in the bones, which is depleted by normal processes when whale skeletons are buried on the seafloor. However, KOBO's unusual circumstances have prevented this process from occurring.

Source: https://www.popsci.com/science/blue-whale-leaking-oil/