Top 5 Largest Animals Ever. These are some of the largest animal species ever. This fast and fun animal list, lists some of the largest organisms the world has ever known.
5. Largest Squid
The colossal squid, sometimes called the Antarctic or giant cranch squid, is believed to be the largest squid species in terms of mass. It is known from only a few specimens, and current estimates put its maximum size at 39–46 ft ( 12-14 meters ) long, based on analysis of smaller and immature specimens, making it the largest known invertebrate. It is so huge that its one eye is larger than a human head.
4. Largest Snake
The fossil of the largest snake to have ever lived was discovered in a mine located in Columbia. The fossils indicate that the giant boid snake was 42 feet (13 meters) long and weighed 2500 pounds (1250 kg)! This prehistoric reptile is believed to have been a massive anaconda-like beast that slithered through tropical rain forests 60 million years ago and fed on primitive crocodiles. It suffocated its prey with a vice strong enough to crush an old car!
3. Largest Shark
These huge prehistoric sharks first appeared in the earth's waters about 16 million years ago. This beast may have grown to lengths over 50 feet (16 meters) and could have weighed up to 30 times more than the great white shark! That's 126,000 pounds (63,000 kg)!
2. Largest Dinosaur
Amphicoelias is a genus of herbivorous sauropod dinosaur that includes what may be the largest dinosaur ever discovered; A. fragillimus. Based on surviving descriptions of a single fossil bone, A. fragillimus may have been the longest known vertebrate at 40 to 60 meters (130 to 200 ft) in length, and may have had a mass of up to 122 tonnes (135 short tons).
1. Largest Mammal Ever
The blue whale is a marine mammal belonging to the baleen whales. At 98 feet ( 30 meters ) in length and 190 tonnes or more in weight, it is the largest and heaviest animal species to have ever lived. As with other baleen whales, its diet consists almost exclusively of small crustaceans known as krill. In spite of its size though, they are hard to spot as they remain submerged for extended periods and rarely surface.