Best moqueuca de pxiexe ever at restaurant papocia... Also great natural pools to snorkel. Not too many people around the place especially we went during low season. The water was very warm but was not very clean on the edges. A lot of leaves and sea weed. Once you are a bit inside water then great place to swim. Also...
The best beach at Morro de Sāo Paulo by far. You may snorkel and see some marine life.
The bad point: prices for drinks and food. They will charge you whatever they want. You will pay as if you were at Paulista Av. In Sāo Paulo.
Anyway, a must.