Though not as impressive as the Sydney Aquarium, Oceanworld can be combined with a visit to Manly Beach for a nice day's outing. There's a decent display of Barrier Reef fish, as well as giant sharks. Also here are the five most venomous snakes in the world. Shark feeding is at 11am on Monday, Wednesday, and Friday. There is also a Dive with the Sharks program, where you can dive in the tanks with giant gray nurse sharks. It costs A$185 for qualified divers, A$220 for qualified divers who have logged less than 15 dives or haven't dived in the last 6 months, or A$250 for nonqualified divers (includes an introduction to scuba diving course). You must download an application form from the website.