Bahama Divers dont do a shark dive.
They are based just over the PI bridge, on New Providence Island. (New Providence is the Isle; Nassau, the capital; Pi= Paradise Island, is just off New Providence......over said bridge. S'really easy....once you're here!)
Whilst i've never cruised and dived here, i've share'd time with many who have with Coves.
You'll be pretty much left on your own recognizance unless you require assistance/ advice here.
More normally, the first dive is off (over) the wall. Floor -6500'. so dont go all the way down......
The actual "Shark Feed" (second dive of two) is a static 45' max (Less, if it's a quiet one (not too many people) and held on the "Ray Of Hope"). You're dives the day before would have to be WILD ON A STICK!?!?! to worry you cumulatively. Watch you're first here dive though if you're really worried. Talk to Mark(from the isle of man) or Chris (the photographer) at Coves if you're really worried. They're "Tech" and know many wonderful scuba secrets!
If you do go with Bahama Divers (for a non shark dive). Look to speak with Collie. Collie just know's everything about everything and is quiet possibly the most descent person on the face of the planet. (JMHO

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Good luck and let us know how it goes?