Blue whale

The Blue Whale (Balaenoptera musculus) is a marine mammal and can reach up to 100 feet long and anything upwards of 200 tons. The average life span of a blue whale in the wild is 80 to 90 years, it is earths largest animal and can eat 4 to 8 tons of krill per day. As well as being the largest animal on earth, the blue whale is also the loudest as their calls can reach up to 188 decibels.