he aquarium features 5,000 creatures, including everything from Great Lake perch (which you can also find at fish fries all around town) to more exotic lionfish, sea anemones, crustaceans and sea horses. A 230,000-gallon SeaTube is home to sharks, stingrays, moray eels and salt-water fish, which swim above and alongside visitors. This very-cool, walk-through tunnel stretches for 175 feet.