Here are the contestants
Marine Creature
Megalodon (Otodus megalodon)
Livyatan
Basilosaurus
Pakicetus
Brygmophyseter
Bird
Phorusrhacos (Terror bird)
Pelagornis (Pelagornithid)
Argentavis (Teratorn)
Moa (Recently extinct species)
Genyornis
Reptile
Titanoboa
Megalania (Varanus priscus)
Wonambi
Meiolania
Madtsoia
Mammal
Predatory Mammal
Andrewsarchus
Barbourofelis (Nimravid)
Smilodon (Saber-toothed cat)
Dire Wolf (Aenocyon dirus)
Short-Faced Bear (Arctodus simus)
Herbivorous Mammal
Woolly mammoth (Mammuthus primigenius)
Macrauchenia (South American ungulate)
Elasmotherium (Extinct rhino)
Diprotodon (Giant marsupial)
Australian Megafauna
Thylacoleo (Marsupial lion)
Procoptodon (Giant kangaroo)
Palorchestes (Marsupial tapir-like animal)
Crocodilian
Purussaurus
Voay
Dentaneosuchus
Hominin
Australopithecus afarensis
Homo erectus
Homo neanderthalensis
