Definitely see One Ocean, and Clyde and Seamore!
To add a few more things that I would consider "must-do's"......
Manta, Kraken & Mako (if you are coaster enthusiasts)
Turtle Trek
Visit the penguins at Antarctica (with or without riding the ride....the penguins are a must-see)
Blue Horizons (our favourite show at the park)
Pets Ahoy
Shark Encounter
Jewel of the Sea Aquarium (at Journey to Atlantis)
Visit the dolphin nursery
Catch the Flamingo Parade through the park
And....if the budget will allow for an extra or two:
- book the Dolphin Encounter ($15 pp)
- pick a pearl at Oyster's Secret ($16.95)
- feed the sea lions and the sting rays (also sharks, too....though we find them less exciting) ($5/tray for food, or 3/$10)
- have a Shamu Sundae....delicious ice cream AND you get to keep the bowl ($6.95)