You might want to use the search function as this question has been asked and answered before. That being said the diving in the Turks & Caicos is boat/wall/no current diving. The area is known for lots of big pelagics. I am surprised when we don't see at lease one reef shark, one turtle and one eagle ray on each dive. If you are lucky your can also occasionally spot humpback whales (in season), dolphins, whale sharks and tiger sharks. On a scale of one to ten I put the Bahamas at a 5, Turks and Caicos at a 8.5, Little Cayman 9.0 and Cozumel 8.5. IMHO.