Sperm whales do not only have the largest brain of any animals, these giants are also the loudest animals in the world. Using a structure called monkey lips inside it’s massive head, it can create clicks that can reach more that 230 decibles.

Sperm whales can grow to 67 feet long and weigh up to 57,000 kilograms. Aside from the world record sound that they can produce, they are also the largest toothed whale, has the biggest brain of up to 8 kilograms and the deepest diving of all mammals. In search of squid and fish, they can dive as deep as 3 kilometers.

Inside a sperm whales’ disproportion head is structure called monkey lips. Through it, it blows air that creates the loudest sound produce by any living animal today – more than 230 decibels. Scientists predict that they use this sound to stun it’s main prey, the deep-sea squids.

Born on April 2, 2010, Einstein is now considered the smallest horse in the world. He is just 14 inches tall and weighed around 6 pounds. This half pinto stallion was born in Barnstead, New Hampshire in the Tiz A Miniature Horse Farm which is own by Judy Smith.

When he was born, his owner feared the he would not live for long because of his size. But now the fear subsided as Einstein appears healthy and enjoys running around in the fields.

Einstein doesn’t suffer any form of dwarfism. He is just really born small. His size is more apparently small when put beside a full grown stallion.

See also the biggest dog breed

Though there are one or two smaller dogs around from other breeds, the Chihuahua is generally considered as the smallest dog breed in the world. The average adult weigh around 1.5 and 3 kilograms and 6 to 10 inches in height. They come in a wide variety of sizes, head shapes, colors and coat lengths. Despite their size, Chihuahuas are highly intelligent. They are graceful, alert and swift-moving little dogs with a bold and lively expressions.

Because of it size, Chihuahua breeders often use terms like Teacup, Pocket Size, Tiny Toy, Miniature or Standard to describe puppies. They are also commonly referred to as either Apple heads – because of its short noses and rounded heads similar to that of an apple, or Deer heads – because of its longer noses and more elongated heads.

It’s miniature size makes Chihuahuas ideal pets for people who live in apartments or houses that don’t have so much space for a large dog. It is also the favorite pets of celebrities, who are often seen carrying them around and sometimes in their expensive purses.

In terms of leg span, the Giant Huntsman spider is considered to be the biggest spider in the world. Like all huntsman spiders, it’s legs are long compared to the body, and twist forward in a crab-like fashion. A full grown adult can have a leg span of 12 inches and a body length of 2 inches.

This long-legged giant was discovered in a large cave in northern Laos in 2001. It is thought to be a cave dweller because of its pale color, long legs and special hairs on the second foot of the male. The coloration is yellowish-brown with several irregularly distributed dark spots on the rear half. The legs have wide dark bands before the first bend.

Apart from its size, the Giant Huntsman spider can be distinguished from other species of Huntsman spiders by genital characteristics. The males’ cymbium is much longer than usual – at least three times longer than the tegulum. The female is distinguished by a characteristically shaped epigyneal field with two anterior directed bands, and the course of their internal ducts.

Averaging in length to more than 7.6 m (25 feet), whale shark is the biggest fish in the world. They feed on macro-algae, plankton, krill, red crab larvae, and small nektonic life such as small squid or vertebrates. Like sharks, its skeleton is composed entirely of cartilage, and its skin, up to 4 inches thick, is scaleless, tough and leathery. People called it a whale shark because of its enormous size.

Whale sharks are filter feeder. Using it’s 1.5 metres (4.9 ft) mouth, they feed by sucking in a mouthful of water then closes its mouth and expels the water through its gills – trapping the tiny planktons in the dermal denticles which line its gill plates and pharynx. This fine sieve-like apparatus can trap anything above 2 to 3 millimetres (0.079 to 0.12 in) in diameter.

Despite it’s ferocious look and size, Whale sharks are gentle giants. Apart from unintentional blows with it’s large tail fin, they does not pose significant danger to humans and even sometimes allow swimmers, divers and snorkelers, to hitch a ride.

The largest Whale shark specimen was caught near Baba Island, in Karachi, Pakistan on November 11, 1947. It was 12.65 metres (41.50 ft) long, weighed more than 21.5 tonnes (47,000 lb), and had a girth of 7 metres (23.0 ft). Though there are stories of even larger ones, there are no scientific evidence that support it.