Perucetus colossus | The Business Standard

Perucetus colossus, an early whale from Peru that lived about 38-40 million years ago, a marine mammal built somewhat like a manatee that may have exceeded the mass of the blue whale, long considered the heftiest animal on record, is seen in an undated artist's rendition. Also pictured are another early whale, Supayacetus, and a human for purposes of scale. Alberto Gennari/Handout via REUTERS THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. NO RESALES. NO ARCHIVES.

Perucetus colossus, an early whale from Peru that lived about 38-40 million years ago

Perucetus was about 66 feet long and weighed up to 340 metric tonnes, a mass that would exceed any other known animal