The Sea Life Melbourne Aquarium in Australia welcomed a new addition to their family in late January—a king penguin chick named Pesto. Weighing less than a pound at birth, Pesto has quickly become a favorite among visitors and online fans alike.

Pesto’s rapid growth has been a topic of fascination for caretakers at the aquarium. From weighing less than a pound at birth, Pesto now tips the scales at a hefty 51.8 pounds. His size, along with his adorable appearance, has catapulted him to social media stardom, drawing comparisons to other famous animal celebrities like Moo Deng, the baby hippo from Thailand.

The aquarium recently threw Pesto a gender reveal party, which further boosted his popularity. Since then, Pesto has been the center of attention, attracting a significant increase in footfall and online engagement. People are flocking to see this giant penguin in person, making him a must-see attraction in Melbourne.

But what makes Pesto so big? Caretakers attribute his size to a hearty appetite, consuming more than 25 fish a day, and good genetics. His biological father, Blake, is one of the largest and oldest penguins at the aquarium, weighing around 39 pounds. Despite being raised by a younger couple, Tango and Hudson, who weigh just about 24 pounds each, Pesto continues to outgrow them.

Currently covered in fluffy brown down, Pesto will soon undergo a transformation as his baby feathers are replaced by black, white, and orange plumage. As he matures, he is expected to reach a weight of around 33 pounds, making him a substantial presence among his fellow penguins.

King penguins, like Pesto, are known for their size, standing between 33 and 37 inches tall and weighing between 31 and 37 pounds. While they are larger than most penguin species, they are overshadowed by the emperor penguin, which can weigh up to 100 pounds and stand 50 inches tall.

In the wild, king penguins inhabit Antarctic and subantarctic islands, with their population numbers ranging between one million and two million breeding pairs. Classified as a species of “least concern” by the International Union for Conservation of Nature, king penguins are thriving in their natural habitats.

Pesto’s journey from a tiny chick to a social media sensation showcases the wonder and beauty of these magnificent birds. As he continues to grow and mature, Pesto will undoubtedly leave a lasting impression on all who have the pleasure of meeting him at the Sea Life Melbourne Aquarium.