If I had a skin, that's what I would wear it but I don't. I have a "tropic" 3/2 jump suit. I'm thinking that it will be OK. The trip has my budget stretched to the limit, so I'm trying to get by with what I already have.
I would really like to try a dive in nothing but a pair of swimming trunks and a BC but from what I read, that might not be a good idea due to stinging marine life.
Both my teens and I have dived in swim suits only many times on Bonaire and Culebra, with only one incident, and that on a night dive where my son tangled with several jellyfish that were drawn in towards the light on a dock.
Morgan simply failed to listen to the pre dive discussion on procedures to follow if there were jellies present, or even that incident would have been avoided.
Since then we all purchased inexpensive skins, mostly as a precaution, but I would not hesitate to dive in swim suit only again. In @20 years of Caribbean diving I have done far more diving in a swim suit than in wet suits and/or skins. Limiting factor is usually more the gradual loss of body heat over a series of 20+ dives during the course of a week , and a 3/2 shorty would be perfect to prevent this.
For me, that is. Not everyone is the same though, as many people get colder more quickly than us...er..more massive guys. I have seen people, especially thinner ladies who get cold in a 5 or 7mm, even in the 80+ waters of Bonaire.