A huge king penguin chick named Pesto, who weighs as much as both his parents combined, has become a social media celebrity and a star attraction at an Australian aquarium.Weighing 49 pounds (22 kilograms) at 9 months old, Pesto is the heaviest penguin chick the Sea Life Melbourne Aquarium has ever had, its education supervisor Jacinta Early said Friday.In contrast, his doting parents, Hudson and Tango, weigh 24 pounds (11 kilograms) each.Pesto’s global fame has grown with his size. More than 1.9 billion people around the world have viewed him through social media, an aquarium statement said.He has eaten more than his own substantial body weight in fish in the past week: 53 pounds (24 kilograms), Early said.The veterinary advice is that that quantity of food is healthy for a chick approaching adulthood.His growth will plateau as he enters his fledging period. He has started to lose his brown feathers …