A penguin chick is held by a keeper at Sydney's Sea Life Aquarium in Sydney, Australia, Nov. 18, 2020. The Aquarium announced the birth of a brood of Gentoo penguins on Sunday, with the oldest entering the world in mid-October, while the youngest hatched just two weeks ago. (Xinhua)

A penguin chick is held by a keeper at Sydney's Sea Life Aquarium in Sydney, Australia, Nov. 18, 2020. The Aquarium announced the birth of a brood of Gentoo penguins on Sunday, with the oldest entering the world in mid-October, while the youngest hatched just two weeks ago. (Xinhua)

A penguin chick is held by a keeper at Sydney's Sea Life Aquarium in Sydney, Australia, Nov. 18, 2020. The Aquarium announced the birth of a brood of Gentoo penguins on Sunday, with the oldest entering the world in mid-October, while the youngest hatched just two weeks ago. (Xinhua)

A penguin chick is held by keeper Kerrie Dixon at Sydney's Sea Life Aquarium in Sydney, Australia, Nov. 18, 2020. The Aquarium announced the birth of a brood of Gentoo penguins on Sunday, with the oldest entering the world in mid-October, while the youngest hatched just two weeks ago. (Xinhua)