Stock Photo - Gentoo penguin Pygoscelis papua on the beach with king penguins and Antarctic fur seal pups at the abandoned whaling station of Stromness, South Georgia, Southern Ocean MORE INFO The gentoo penguin is the third largest of all penguins worldwide, with adult gentoos reaching a height of 51 to 90 cm 20-36 in There are an estimated 80,000 breeding gentoo penguin pairs in the Antarctic peninsula area with a total population estimate of around 314,000 breeding pairs in all of Antarctica Gentoo penguins are listed as Near Threatened on the IUCN Red List