Construction workers are adding the finishing touches to River Otter Falls which will officially open on May 2 inside the Tennessee Aquarium’s Cove Forest. This dramatically transformed habitat is the most extensive redesign in the 22-year history of Chattanooga’s top attraction.So what does it take to build a state-of-the-art home for a romp of seven feisty otters? To begin, you have to think like an otter.