the most ancient sea mammal would have to be the flat fish although it is endangered.
In the mediteranian sea..
With the slowness and low capacity of animal transport and wagons, boat transport by sea and river was by far the most important.
its possible that there could be an old animal in there from thousands of years ago but ehhhh prolly not
sea urchin
Whale
killer whale
...
the catfish
He was god of the sea; father of the most ancient sea gods.
Yellow Sea
its a live sea animal its a live sea animal its a live sea animal its a live sea animal its a live sea animal
Sperm Whale @ 57,000 kilograms .