A fish once thought to have died out in prehistoric times is continuing to throw up surprises for scientists.
Scientists have discovered an ancient symbiotic relationship off Japan that was long thought to be extinct.
New evidence has cast doubt on the idea that the coelacanth hasn't changed at all in millions of years.
Considered to be a 'living fossil', the frilled shark has remained unchanged for over 80 million years.
Referred to as a 'living fossil', the coelacanth has barely changed at all in over 300 million years.
A living fossil has been discovered in the form of a Pacific eel with unusually primitive features.