Do I have to change my swimsuit at the hotel before I go snorkeling in Taodao?

Usually I put it on in advance and went straight to the boat to follow. Every time I go, I wear it directly and can go into the water. Generally, there are few people changing clothes on the boat, almost none. I suggest you get dressed in advance, or you can change in the ship's bathroom. Anyway, the boat is full of bikini trunks. It's nothing.