Here on Guam, the water temperature is usually around 84-86 degrees. Well, it was chilly 83 degrees today...We get a LOT of Japanese tourists here and they usually go diving. I would venture to say that ALL of them wear wetsuits. I wear swim trunks and a T-shirt. Am I missing out on anything? Is it the bouyancy or the protection from jellyfish, coral, and eels biting you? Can someone shed some light on this for me? Thanks!