Simple and clear explanation for young children about how sea turtles live in the ocean but come to the beach to lay their eggs.
Sea turtles swim and live in the ocean, but when it's time for them to have babies, they come out of the water and lay their eggs on the sandy shore. Think of it like this: sea turtles feel safe swimming in the sea, but their eggs need to be laid on land where they can stay warm and dry until the baby turtles hatch.
Another way to say it is: Sea turtles spend most of their life in the water, but they visit the beach to make nests and lay their eggs.
Or you can say: Sea turtles live in the ocean but lay their eggs on sandy beaches to protect them until the little turtles are ready to go back into the sea.