Playful gentoo penguin frolicking at Sea Life Melbourne. “The gentoo penguin is easily recognized by the wide white stripe extending like a bonnet across the top of its head and its bright orange-red bill. It has pale whitish-pink webbed feet and a fairly long tail - the most prominent tail of all penguins. They are the third largest penguin species after the king and the emperor penguin. Gentoos live mainly on crustaceans, such as krill, with fish making up only about 15% of the diet.”