$30 - not worth it in my opinion! The best feature is the conveyor belt shark tunnel where you step on the human conveyor belt as it takes you under and around the shark tank.
In comparison with the newly renovated Vancouver Aquarium, the Vancouver one is better imo. In comparison, the Ripley's Aquarium does not have as many interesting fish, lacks any mammals (dolphins, whales, sea otters, and penguins). Also, it does not have as many interactive features (4D theater) and is quite a bit smaller.