I live in Belize and have done several thousand dives here. Almost all, regardless of depth, have been in a skin, not a neoprene suit. When I say "regardless of depth" I include 400ft dives to the bottom of the Blue Hole.
My present skin has a very thin and stretchy outer layer with almost a pile liner. Virtually no buoyancy, thick enough not to be revealing (!), dries very quickly on, and comfortable to wear all day. Quite unlike neoprene in several of those characteristics. Mine came from LA and the label simply says "Diveskins". It's the second I've had from that manufacturer, as the first left my possession with a visiting diver (grrr!!) and I can't speak highly enough of it. Light and compact to pack.
Water temperatures here are currently about 84f. Expect them to rise to 85-86 by the time you're here.
I would ALWAYS have a suit with long arms and legs. Pica-pica (jellyfish larvae stings) can be extremely uncomfortable. Seagrass can sting as well.