<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> <P> The facility features several interactive exhibits, including a horseshoe crab touch tank and a stingray touch - and - feed tank . </P> <P> The aquarium continues to focus on conservation . To that end, it houses numerous endangered or threatened species: 12 species of fish, six of reptiles, two of mammals, and two of birds . It participates in the AZA's Species Survival Plan for Sumatran tigers . </P> <P> A volunteer program administered by the Deep Blue Sea Foundation, a nonprofit group, is in place . The Deep Blue Sea Foundation was formed after Landry's purchased the aquarium to ensure the educational goals of the original founders would continue to be met . The aquarium also periodically hosts for - cost educational seminars . </P>

Why are there tigers at the denver aquarium
find me the text answering this question