At which beach/coast can I see crabs/turtles in the wildlife

Hi guys,

I love crabs and sea animals. I really would love to see some of them in Okinawa. I know that you are not allowed to touch (most of?) them but I just wanna observe them. Does anybody know where I have the chance to see some? I'm staying in Naha, so I hope there's something near. 🙏