Diving recommendations?

[baitfish]

I finally got my card a moth ago after getting certified in July. I plan on doing some diving on a cruise we have planned in May. We are going to Cozumel, Belize, and Nassau. Does anyone have any recommendations for any of the spots?

Due to funds, I will probably only be able to get one trip in at these spots, so I want to maximize it.

Thanks!

Adam