lmsmith, are you going to visit The National Aquarium, they have just started up Snorkelling in the Oceanarium, You don't need to be a diver to do it. Anybody can go. The do 3 groups a day. You might want to book if you want to do it. Well worth doing, I have done it and I am not a diver or a swimmer. Was one of the most fantastic things I have done. Cost is $50.00 per person and worth every cent.