It’s a bird, it’s a plane, no.. it’s a penguin! (ノ≧∀≦)ノ
A water park/aquarium in Tokyo, called Sunshine Aquarium features an overhead, ring-shaped, transparent tank where penguins (or, most of the time, seals), swim smoothly in the crystal clear water, making it appear that they are actually flying!
ヾ(@゜▽゜@)ノ
It sure is a very refreshing sight especially on a hot, summer day!