Astraspis was one of only a few fish species prior to Earth’s first mass extinction 450 million years ago. This tiny fish had something never before seen on Earth: a primitive backbone.
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Triceratops, with its distinctive frills and horns, had one of the largest skulls of any land animal. It was a formidable match for Tyrannosaurus.
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The straigh-shelled nautiloid was the great white shark of its time. A perfectly designed killing machine, it was up to 20 feet long and had an insatiable hunger.
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Acanthodian, a fish, is one of the first vertebrates with jaws. This revolutionary adaptation allows fish, a once-rare lifeform, to take over the planet.
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Phobosuchus was a prehistoric monster, the largest species of crocodile ever known to have walked the earth. Instead of zebras and wildebeest, it fed on dinosaurs.
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Eusthenopteron, an ancient fish, was an agile predator with a nasty bite. Eusthenopteron had many unique features shared by the earliest land vertebrates.
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Get more Animal Armageddon at animal.discovery.com Sea scorpions called eurypterids challenged nautiloids for feeding grounds. ... animal Armageddon prehistoric animals
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Animal Armageddon: Tiktaalik
