Maui Ocean Center
You'll get a full introduction to the sea life that makes Hawaii special at this aquarium, which focuses on creatures of the Pacific. One highlight is the acrylic tunnel that runs through the 750,000-gallon Open Ocean tank, providing an up-close, underwater look at more than 50 marine species, including sharks and stingrays. Shallow Reef and Living Reef exhibits enlighten you on the coral ecosystem, and a whale exhibit has interactive learning stations and a dome theater that uses 3D technology to give you a mesmerizing humpback-whale's-eye-view. Cultural exhibits focus on the First Hawaiians and their relationships with the sea and on the history of Kahoolawe, a neighboring island that can be seen just across the Alalakeiki Channel.
Although it's not an enormous facility, you should allow two hours or so to explore it all. The center is part of a complex of retail shops and restaurants overlooking the harbor. Enter from Honoapiilani Highway as it curves past Maalaea Harbor. The aquarium's gift shop is one of the best on Maui for artsy souvenirs and toys.
