By Sheetal Kumari | May 15, 2025
Lived more than 450 million years, this sea creature lived before dinosaurs and remains alive with its hard shell and blue blood.
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Declared extinct in 1938, this deep-sea fish has lived for 400 million years, with distinctive lobed fins and ancient roots.
(Image: Canva)
This spiral-shelled mollusc is 500 million years old and continues to employ jet propulsion to travel through ocean waters.
(Image: Canva)
This reptile, native to New Zealand, looks like lizards but belongs to a distinct lineage that is 200 million years old.
(Image: Canva)
A “living fossil” because of its grotesque appearance, this deep-sea shark has not evolved much in 125 million years.
(Image: Canva)
These big, slow-growing fish have been around for more than 200 million years and are renowned for yielding rich caviar.
(Image: Canva)
It has a jawless mouth and eel body and has not changed in 360 million years, parasitically feeding on other fish.
(Image: Canva)
Air-breathing ancient fish with a 400-million-year history that rode out mass extinctions on their peculiar lungs.
(Image: Canva)
This bizarre mammal with a bill like a duck and webbed feet has characteristics connecting it to 100-million-year-old ancient monotremes.
(Image: Canva)
Today’s alligators are very similar to 200-million-year-old ancestors, making them one of the most successful predators on Earth.
(Image: Canva)