Jellyfishes are one of the longest existing species. They have been on the earth nearly 500 millions years.
They have been unchanged now for approx 445 million years. They are similar to spiders.
This is also known as the elephant fish. They have existed on the earth for approx 400 millions years.
These are ancient lobed fish which are on the earth for approx 400 millions.
Lampreys are jawless vertebrates. They have been on earth for nearly 340 million years.
This is a species similar and close to platypus. A species resembling between a porcupine and a hedgehog.
This is one of the species which have been the same for approx 1000 million years.
They are native to the upper regions of North America. They are on the earth approx 200,000 years.