Is the blue whale the biggest animal to ever exist?

By considerable measure, the largest known animal on Earth is the blue whale. Mature blue whales can measure anywhere from 75 feet (23 m) to 100 feet (30.5 m) from head to tail, and can weigh as much as 150 tons (136 metric tons). read more

In sheer mass, the truth is that the blue whale is the largest animal to have ever existed. However, when looking at the length of the prehistoric dinosaurs, the specimen Amphicoelias, otherwise known as “A. Fragillimus”, proves to be a greater distance from head to tail. read more

The blue whale (Balaenoptera musculus) is a marine mammal belonging to the baleen whale parvorder, Mysticeti. At up to 30 metres (98 ft) in length and with a maximum recorded weight of 173 tonnes (190 short tons), it is the largest animal known to have ever existed. read more