sealskin98:As has been said...full suit of whatever thickness is good for you for insurance against thimble jellys or an accidental brush of the lower leg against the reef on a "tight" swimthrough.
I get cold easy in local lakes and usually stay above the thermo., but have been using just a lycra in Coz. for about 10 years. Get kinda chilly once back on the boat though if there is a breeze. Brrrr. Thinkin' about gettin' a .05 or 1 mm. for those trips.
You see quite a bit of 3 mm. there, but that's too much for me to mess with in 80* water.
We were kinda worried about the gal from Oz. on a swimthrough, but she did great.
No stings, no fire coral, no jelly stings. But she was used to diving in Austrailia and had good buoyancy control.
For some reason I really don't remember too much about the marine life I saw on that dive.
What? You Texas gentlemen didn't go over and fix her tanks strap? ...and had she gotten scraped or stung I have no doubt that she would have been well attended to. Brave girl. Not only diving in a bikini but one with side ties on the bottoms.
I grew up in the Canadian Rockies and I still dive in a 5mm up to mid-80 water temps. I keep my string bikini's for apre-dive beach and pool deck time.