There are two types of sea turtle. A turtle with strong flippers and a turtle with not so strong flippers.
The sea turtle can have up to 100 to 150 eggs at one time. But only half of the eggs will survive.
Only half will survive because when they hatch and go to the water there is predators that are hungry so only the ones that go to the water safely will survive.
When they go to the ocean they are still not safe because they still have predators in the ocean so they have to find a place they are safe in. When the turtles get older they reproduce and have babies. The more turtles that their would be are strong flipper turtles.