Axolotl
The axolotl (or Ambystoma mexicanum) is an amphibian found exclusively in freshwater lakes in Mexico, with only Lake Xochimilco remaining as their natural habitat. Its wild type is green and brown in colour, with dark speckles across the body, however axolotls in the pet trade are often leucistic (white) or come in a number of other, vibrant colourmorphs. They have prominent gill fans protruding from their necks, a feature common in all salamander larvae, although due to their more aquatic lifestyle, the axolotl keeps these external gills.
Siamang
The siamang (or Symphalangus syndactylus) is a species of gibbon living in the rainforests of the Malay Peninsula and Indonesian island of Sumatra. Their body is covered in all-black shaggy fur, which is thinner and grey on their faces. Siamangs have very long arms - their arm span approximately measuring twice their body length, short and sturdy legs and no tail. One of their most prominent features is the throat sac under their chin, which inflates during their distinctive vocalisations. Typically, siamangs are 75cm to 100cm tall and weigh between 10kg and 13kg.