1. Blue Whale
Biggest specimen recorded: 112 ft
So, we have finally come to the number one of the biggest animals in the world found alive, and also the largest animal in the world ever recorded. Yes, bigger than any dinosaur ever. These amazing animals can live up to 90 years, and weigh up to 200 tons. The blue whale is also the largest mammal in the world whose calves are about 25 feet long and weigh around 3 tons. But these huge animals only feed on krill, and they need up to 4 tons of food daily! The largest specimen recorded was 112 feet long, and the heaviest one weight 245 tons. With this largest sea creature ever we are finishing our list.