The emperor penguin, dubbed Happy Feet, was released into the water from the New Zealand fisheries vessel Tangaroa near Campbell Island, about 700km south of New Zealand's South Island.

You may have heard penguins being referred to as the “birds of the sea,” but unlike most birds, they can’t actually fly.

It allows penguins to move on land while conserving energy, which is especially important in the cold and barren environments they call home. Their stiff, webbed feet are perfect for gripping icy ...

Instead, Hesperornis relied on its powerful hind legs and webbed feet to chase prey and evade ... It probably fed and bred much like a penguin.