Earth’s Largest Animals

Earth’s Largest Animals

The ocean is a wonderful and mysterious place. There are over 1 million identified and named species living in our global oceans – not to mention what scientists estimate to be 9 million undiscovered ones! Earth’s oceans are still largely unexplored, despite covering roughly 72% of the planet (Discovery). Considering how vast and deep they are, it’s no wonder the five largest mammals on earth lurk in the deep parts of the sea.


In fifth place, the colossal squid is on average between 39 and 42 ft. long and weighs around 1600 lbs. It certainly lives up to its name: just one of its eyes is larger than the human head! The colossal squid is the largest invertebrate currently known to man, occupying a large portion of the world’s southern oceans.

Next, comes the giant beaked whale, weighing in at up to 31,000 lbs. These whales have long, prominent beak-shaped noses can be black or gray, and have been known to live at least 85 years! Little is known about these mysterious mammals, but they have been observed traveling in pods of 3 to 10, often off the coast of Asia.

The sperm whale, at third, is the largest predatory mammal with teeth on earth. The average sperm whale is between 77,000 and 130,000 lbs., 40 ft. long, and live around 70 years. They have the largest brains of any mammal ever studied in history. An imposing creature, the sperm whale has no natural predators.

The North Pacific right whale can weigh up to 180,000 lbs. Unfortunately, the whale is currently classified as endangered and are extremely rare. Little is known about the behaviors of North Pacific right whales, other than the fact that they are not aggressive hunters, mostly feeding on small copepods off the coast of Alaska, Russia, and Japan.

The largest mammal known to man, the massive blue whale can weigh up to 300,000 lbs. and 98 ft. in length! These enormous whales are in fact the largest animals to ever have existed – even outclassing dinosaurs. Despite their frighteningly gigantic size, these whales are relatively harmless, feeding almost entirely on krill. Blue whales are known to “sing” while they swim, and are a variety of blue shades in color. The species is known to live in Antarctic regions, as well as the North Pacific and the Indian Ocean.