Apple Head Chihuahuas have a large head in relation to the size of their body and it’s the only dog breed born with a soft spot on their skull, like a human baby, known as a Molera.

The Eurasian blue tit is a small passerine bird in the tit family, Paridae. It is easily recognisable by its blue and yellow plumage and small size.

Catfish are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers.

The Dumbo octopus is the deepest-living genus of all known octopuses. It lives at least 13100 feet (4000 m) below the surface.

Electric eels can generate an electrical charge of up to 600 volts in order to stun prey and keep predators at bay.

Fried Egg Jellyfish are jellyfish that sport a smooth translucent bell that has an elevated yolk-yellow bell at the center.

The name “glass frog” is derived from the white, translucent skin on its belly, where the frog’s beating heart and other organs are visible.

The harp seal is a true seal that lives in the north Atlantic and Arctic Oceans, spending long periods of time associated with sea ice.

The common name "inchworm" applies to a large group of caterpillars that includes many different species of moth larvae.

Also commonly referred to as the African penguin, they make donkey-like braying sounds to communicate.

The Key deer is an endangered deer that lives only in the Florida Keys. It is a subspecies of the white-tailed deer.

The Superb Lyrebird has received its name from its tail feathers which look similar to a lyre (an ancient Greek musical instrument).

Marble foxes aren’t a naturally occurring species. Instead, they’re the offspring of red and silver foxes purposefully bred by humans.

This Brazilian mystery bird is has no white in its plumage, despite what its name implies.

Japanese folklore says that when these long, serpent-like silver fish emerge from the depths, a major earthquake is imminent.

Pseudis paradoxa, known as the paradoxical frog or shrinking frog, is a species of hylid frog from South America.

The term queen bee is typically used to refer to an adult, mated female that lives in a honey bee colony or hive; she is usually the mother of most, if not all, of the bees in the beehive.

The Ragdoll is a cat breed with a color point coat and striking blue eyes. Their form is large and muscular and their coat is silky soft and semi-longhair.

The name sea pen derives from their resemblance to quill pens. They occur in shallow and deep waters from polar seas to the tropics.

The rainbow-billed toucan is the national bird of Belize. While often compared to hornbills, toucans are actually close relatives of the woodpecker!

Umbrellabirds are notable for their unique, umbrella-like crest and for the pendant suspended from the throat, which is an inflatable wattle.

Though it resembles both, the vampire squid is neither a squid nor an octopus. It is a unique animal that has been separated by scientists into its own group.

Wombats are one of the oddest-looking animals you'll ever see! Native to Australia, the comical animals look like short, stocky bears.

The fish is known as X-ray Tetra due to its distinct translucent body, making the fish's backbone clearly visible.

The yeti crab is an unusual, hairy crab with no eyes, was discovered in 2005 on a hydrothermal vent near Easter Island.

The zebra shark is a large, distinctive shark that lives in shallow coral reef habitats in tropical waters where they can wriggle into narrow crevices and caves in search of food.