Sirens

• Sirens are a type of salamander that resemble eels and can grow up 16 inches long. Sirens breathe through their skin but also possess lungs and gills. Their teeth are located in their throat rather than in their mouth. Unlike many salamanders, their toes end in claws. Sirens possess only two front legs and live in aquatic areas such as swamps.
  
  

Newts

• A form of small salamander, newts live near to or permanently in water and are typically found in the woodlands of Asia and North America. Adult newts have both lungs and gills and have four legs. Newts survive on tiny fish and insects. A newt's color varies -- some are brown, while others have green skin; young newts typically have red or orange skin.
  
  

Mole Salamanders

• Mole salamanders are common in the U.S. The flatwoods salamander, for example, is found in the pine forests in the Southwest and tends to be roughly a third of a foot long. The tiger salamander, meanwhile, is considerably larger, at roughly a foot long, and preys on worms. This breed of salamander is recognizable thanks to the yellow spots and other markings that cover its body. It is found in mountainous areas and lowlands.
  
  

Giant Salamanders

• Some of the biggest salamanders fall into this type. These include the hellbender, a strange-looking amphibian also called the snot otter. The largest salamander on the North American continent, the hellbender has a flat head and body and slimy skin, which has given it a bad reputation among fishermen who fear the damage it'll do to their nets. The hellbender lives in streams and is a fast swimmer. The largest amphibian on the planet, the Chinese giant salamander can grow to about 6 feet long and lives in lakes and streams, eating food such as crabs. This salamander was classified as critically endangered in 2011, thanks to the loss of its food and habitat.
  
  

Amphiuma

• A subspecies of the salamander is the amphiuma, sometimes referred to as a Congo eel despite, though it is not a fish. The amphiuma has four little legs but is unable to walk, and so typically spends much of its life in water. The amphiuma comes in a few varieties, recognized by the number of toes each has. The one-toed amphiuma, for example, is a slender salamander measuring up to 12 inches long, while a three-toed amphiuma is about 42 inches. The amphiuma eats crayfish as well as insects and spiders.