Downtown Aquarium Houston Houston Aquarium is updating their tiger exhibit!

At 3,500 square feet in size (0.08 of an acre) the enclosure appears to be far too small for modern standards.

And for four tigers... that's less than 900 sq ft per animal. I suspect that if you combine the indoor exhibit space, they are sitting around the AZA's minimum spatial recommendations (1,600 sq ft to start, plus 50% for each additional tiger).
 
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