There's plenty to see here, including Australia's largest walk-through aquarium, where you are surrounded by sharks, stingrays, turtles, and hundreds of colorful fish. You can also come face to fin with pretty leafy sea dragons, and observe some of the ocean's deadliest creatures, such as blue-ringed octopus and stonefish. You can experience each of WA's various ocean ecosystems during your visit, and there's a touch pool, a great attraction for small (and bigger) kids. Ocean Guides provide talks on marine creatures throughout the day. For A$159 plus A$20 for snorkel gear or A$40 for dive gear (diving qualifications required), you can swim with the sharks (daily 1 and 3pm). Advance bookings essential. Allow half a day here.