I don’t have one I just love that this structure is called a melon. 🍉

The melon is a mass of adipose tissue found in the foreheads of all toothed whales.[1][2] It focuses and modulates the animal’s vocalizations and acts as a sound lens. It is thus a key organ involved in communication and echolocation.

https://en.m.wikipedia.org/wiki/Melon_(cetacean)