What does it mean to wear a turtle skull?

It is unique to tantric orthodox Buddhism. Because of the different teachings and opinions of Mahayana, it is difficult for you to see this kind of beads. Even if you see them, there are misunderstandings. It is not fierce and majestic, but represents submission. There are demons outside the Buddha. This kind of skull bead is not something that sects can hold. It's an instrument of the Tantric King Kong Department.