World's largest dolphin used to live in Amazon 16 million years ago — 11-ft fossil discovered

World’s largest dolphin fossil have been uncovered in the Peruvian Amazon, showing the mammal measured up to 11 feet long.

In the Peruvian Amazon, the remains of an ancient species distantly related to the rare and endangered river dolphin have been discovered, according to Daily Mail.

The ancient creature was distantly related to the rare and endangered river dolphin that live around South America, as per the suggestion by paleontologists at Switzerland's University of Zurich (UZH).

The fossils suggested that when it roamed the oceans more than 16 million years ago, the newly found Pebanista yacuruna had poor eyesight, an elongated snout and numerous teeth.

The new species have been name in the honour of the mythical people known as Tacuruna by the team.

Tacuruna were said to live in underwater cities around the Amazon basin.

The skull of the dolphin was first discovered by the researchers during a 2018 expedition to Peru.

This was the time when they saw the fossil protruding from the embankment of the Napo River.

The Amazonian waters worked through sandstone in a westward direction about 10 million years ago, forcing the remaining lake water to flow eastward.