Among the sea of glossy black and white penguins which call a popular Australian aquarium home, one baby bird stands out like a sore thumb. Chocolatey brown, obscenely fluffy, and towering a head above his own foster parents – plus weighing more than both combined - is Pesto.

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.