With origins dating back 450 million years, Horseshoe Crab predates dinosaurs and remains nearly unchanged.
Coelacanth thought to be extinct for 66 million years, this deep-sea fish was rediscovered in 1938, by stunning scientists.
Nautilus, a shelled marine mollusk has been around for 500 million years, navigating oceans long before the rise of mammals.
Alligator Gar, an ancient fish, resembling a crocodile, has existed for over 100 million years in North American waters.
The largest living lizard, Komodo dragons are descendants of giant reptiles from 4 million years ago.
Native to New Zealand, Tuatara is a lizard-like reptile that has remained unchanged for 200 million years.
Known for producing caviar, sturgeons have been swimming in rivers for over 250 million years.
Crocodiles as powerful predators have barely changed since the age of the dinosaurs, 240 million years ago.
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