The aquarium's signature feature is "Nix Castle," modeled after an ancient castle floating on the lake. The aquarium boasts one of the largest displays in Hokkaido, boasting approximately 400 species and 20,000 exhibits. It's packed with photogenic attractions, including an 8-meter tower tank, an aqua tunnel with fish swimming overhead, and a fantastical jellyfish exhibit. Enjoyable even on rainy days, it's perfect for photographers and families alike.

It also offers a wide variety of indoor and outdoor attractions. Seasonal schedules include dynamic performances by bottlenose and Pacific white-sided dolphins, a penguin parade, a sardine performance featuring sparkling sound and light, and fur seal and seal time. Deep-sea creatures from around the world are on display. See rare creatures like giant octopuses and cricket eagles. You can even feed the penguins.

The "Kids Touch Pool" and "Drawing Swim" experiences are also popular, especially for young children.

It's about an hour and a half by highway from downtown Sapporo.