<P> Although the aquarium was highly successful and the attendance was high for years, after the 9 / 11 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 . </P> <P> After the purchase, the facility remained open to the public until the summer of 2005, when it closed briefly for renovations . These included the addition of a full - service restaurant, bar, and ballroom . A 150,000 - US - gallon (568,000 l) marine aquarium was added to the restaurant area . Upon its reopening July 14, 2005, the facility was renamed Downtown Aquarium . </P> <P> 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 . </P> <P> After the 2005 renovations, the two journey paths remain, but are no longer arranged in a strictly zoogeographic pattern . For example, tanks on the second pathway (formerly the Kampar River Journey) depict African and South American freshwater ecosystems; other tanks are mixed community aquaria . The sea otter exhibit was removed to make room for the restaurant tank . </P>

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