Chocolatey brown, obscenely fluffy, and towering a head above his own foster parents – plus weighing more than both combined - is Pesto. Affectionately dubbed a "fatty", an "absolute unit", and a "linebacker", the chonky chick has shot to viral superstardom and attracted a legion of obsessed fans, including popstar Katy Perry.

The internet loves big babies - at least according to the fervor around its latest super star, Pesto the seriously huge baby penguin.

Meet Pesto the king penguin. At just nine months old and 22.5 kilograms (50 pounds), he’s already bigger than his parents at the Sea Life Melbourne Aquarium in Australia. Photos of Pesto – who is 90 centimeters (about three feet) tall – towering over his parents have gone viral online.