What structural adaptations do sea turtles have?

They get mad when another turtle takes it's place as the parent for the baby turtle's sake of life and death.The giant turtle will use it's structural adaptations to fight for it's child.It may bump the other turtle's shell then swim off, so it can make the fake parent of the baby turtle will follow it into some dark places in the sea then get lost.Then the real parent comes back to take the child far away from the false parent.