Downtown Aquarium (formerly Colorado's Ocean Journey) is a public aquarium and restaurant located in Denver, Colorado at the intersection of I-25 and 23rd Ave. The 107,000 square feet (9,900 Sq mi) main building sits on a 17-acre (6.9 ha) site adjacent to the South Platte River. Its freshwater and marine aquaria total approximately 1,000,000 US gallons (3,785,000 l), and exhibit a variety of fish and other animals.
Colorado's Ocean Journey was founded by Bill Fleming and Judy Petersen Fleming as a nonprofit entity. It was partially funded by a $57 million bond loan as well as loans by the department of Housing and Urban Development, and its total cost was $93 million. The facility opened June 21, 1999 and soon earned accreditation by the Association of Zoos and Aquariums (AZA).
Although the aquarium was highly successful and the attendance was high for years, after the 911 tragedy in 2001, the number of visitors fell drastically within a few months, and the aquarium failed to meet its attendance projections of over a million visitors per year, in part because of a downturn in the U.S. economy. The aquarium was not able to make payments on its high construction debt, and Colorado Ocean Journey Liquidation Inc. filed bankruptcy April 2002 with a $62.5 million debt. After a last-minute bidding war with Ripley's Entertainment, Landry's Restaurants, Inc. purchased the facility in March 2003 for $13.6 million.
A major theme for this landlocked aquarium is the relationship between inland freshwater ecosystems and the ocean. The original design of the aquarium was zoogeographic. It focused on the path to the ocean taken by two rivers, the Colorado River in North America and the Kampar River in Indonesia. The Colorado River Journey included exhibits of endangered fish, including Desert Pupfish; gamefish such as bass; and northern river otters, among other species. It ended with a large exhibit depicting the Sea of Cortez (Gulf of California), into which the actual Colorado River empties. The Indonesia River Journey included exhibits of animals such as Asian arowanas, rainbowfish, and endangered Sumatran Tigers, among other species. It ended with a large exhibit depicting the southern Pacific Ocean. In addition to these two journeys, the aquarium housed a large sea otter exhibit.