Skullfish

Majora's Mask
These skeletal fish live in the seas around Great Bay in Majora's Mask. They swim at you so they can hold onto you with their teeth. Dispose of them by putting on your electrical attack as Zora Link.

Twilight Princess
In Twilight Princess, they appear in Lakebed Temple. It is possible to catch them with your Fishing Rod, and you'll receive a Heart from them, though they won't be stored in your journal due to being an illegal fish.