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Animals are a major group of multicellular, eukaryotic organisms of the kingdom Animalia or Metazoa. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their life. Most animals are motile, meaning they can move spontaneously and independently. All animals are also heterotrophs, meaning they must ingest other organisms for sustenance...

Pacu (Portuguese pronunciation: paˈku) is a common name used to refer to several common species of omnivorous South American freshwater fish that are related to the piranha. Pacu and piranha don't have similar teeth, although the main difference is jaw alignment; piranha have pointed, razor-sharp teeth in a pronounced underbite, whereas pacu have squarer, straighter teeth, like a human, and a less severe underbite, or a slight overbite...

Apparent death, colloquially known as playing dead or playing possum, is a behavior observed in a wide range of animals which take on the appearance of being dead to an observer. This form of animal deception can be either an involuntary reflex action as in tonic immobility, or, an adaptive behavior as in thanatosis. Apparent death can be used as a defense mechanism or as a form of aggressive mimicry...

Shane Willmott is a professional mouse trainer. He’s been training mice to surf for about 10 years (seriously), and he said he decided to teach them to skateboard because it was too cold in winter to take them to the beach. Now, the Australian has taken on a new challenge - training his radical rodents to skateboard. Willmott, who lives in the Gold Coast area of eastern Australia, near Brisbane, has even built his furry friends a mini skate park...

Bears are mammals of the family Ursidae. Bears are classified as caniforms, or doglike carnivorans, with the pinnipeds being their closest living relatives. Although there are only eight living species of bear, they are widespread, appearing in a wide variety of habitats throughout the Northern Hemisphere and partially in the Southern Hemisphere. Bears are found in the continents of North America, South America, Europe, and Asia...

A pig is any of the animals in the genus Sus, within the Suidae family of even-toed ungulates. Pigs include the domestic pig, its ancestor the wild boar, and several other wild relatives. Pigs are omnivores and are highly social and intelligent animals. Description and behaviour A typical pig has a large head with a long snout which is strengthened by a special prenasal bone and by a disk of cartilage at the tip...

The loggerhead sea turtle (Caretta caretta), or loggerhead, is an oceanic turtle distributed throughout the world. It is a marine reptile, belonging to the family Cheloniidae. The average loggerhead measures around 90 cm (35 in) long when fully grown, although larger specimens of up to 280 cm (110 in) have been discovered. The adult loggerhead sea turtle weighs approximately 135 kg (300 lb), with the largest specimens weighing in at more than 450 kg (1,000 lb)...