How do sea turtles protect themselves?

According to https://www.worldwildlife.org/, sea turtle's “length is 2-6”. Sea turtles rely on beaches for nesting. A sea turtle has flippers, a head and a shell. A sea turtle needs its shell to stay safe from predators because a sea turtle's shell is hard and when the predator comes and tries to eat it then the sea turtle swoops to their shell. My favorite fact about the sea turtle is that they have a shell to protect themselves with.