Top 10 Biggest Animals That Are Extinct. A little ice age reduced their population drastically, later humans started to eliminate them for food and other goods that became major cause for their extinction. Top 10 animals in danger of extinction most of them are caused directly or indirectly by man.
Still, most experts agree that the 10 fish on this list are gone for good—and that many more species will vanish if we don't take better care of our natural marine. They were up to 6m. They are the first species of dolphins that have been driven to extinction by the activities of human beings.
Great auk was largest of all auks who extinct since 1844.
Alyce on september 20, 2018: It's a good thing the megalodon went extinct 1.6 million years ago and you won't find it lurking in the ocean somewhere. Contrary to popular belief that the giant squid is largest in the squid family, the colossal squid is actually the biggest. The skull of steller's sea cow.