Blue Whale: At 30 meters (98 ft) in length and 170 tonnes or more in weight, it is the largest whale and the largest known animal ever to have existed.
Giant Golden-Crowned Flying Fox: Also known as the golden-capped fruit bat, is a rare megabat and the largest bat in the world.
Emperor Penguin: The Emperor Penguin is one of the heaviest living birds as well as the largest penguin, with a maximum height of 1.35 m (4.3 ft) and weight of 46 kg (102 lb).
Green anaconda: The heaviest snake in the world with range from 30 to 70 kg (66 to 150 lb) in an average-range adult.
Eastern lowland gorilla: The eastern lowland gorilla is the largest living primate. Found at the mountainous forests of the eastern Democratic Republic of the Congo.
Killer Whale (Orca): The Killer Whale, or Orca, is actually part of the Dolphins family, making it the largest species of the oceanic dolphin family.
Capybara: The largest living rodent, native to most of the tropical and temperate parts of South America east of the Andes.
Saltwater Crocodile: The largest living reptile. The males of this species can reach sizes of up to 7 m (23 ft) and weigh as much as 2,000 kg (4,400 lb).
Ostrich: The largest living bird. A large male ostrich can reach a height of 2.8 m (9.2 ft) and weigh over 156 kg (345 lb).
Giant Huntsman Spider: The world’s largest spider by leg-span with a 30 centimeter (12 inches) leg-span (!!), and 4.6 centimeters (1.8 inches) body-length.