The document describes several Antarctic animals. Emperor penguins breed from April to December and can grow up to 1.5 meters and 30kg. Leopard seals are the largest predators in Antarctica, growing up to 3 meters long and weighing 350kg. Southern elephant seals are the largest seals in the world, reaching up to 4.5 meters long and weighing up to 4 tonnes. Crabeater seals feed by taking mouthfuls of water containing krill which get trapped in their teeth.