Axolotian

Appearance
The axolotian is a humanoid, with defining features of an axolotl. They can be seen with gills on the sides of their heads, small eyes, usually black or purple, and their skin color varies, being purple, pink, yellow, brown, and blue. No children axolotians have ever existed, since the process of how they're made leaves them fully mature already.

Due to the rarity of this species, they are seldom seen anywhere. Axolotians are a species that explore often taking them to all kinds of different lands, and worlds.

Note: Though there are most likely other species named axolotian, this one is different from them.

Origin
The nature of this species is strange. They were created by a man that the axolotian Ripley simply refers to as "The Professor", though he did not provide a physical description of him.

Discovering The Axolotls
The Professor was obsessed with life, and the secrets to it. This obsession sent him on a quest, seeking immortality. On his adventures, he had been led to a far off land, with giants caves, and large mountains. Whilst exploring this strange land, he came across a giant cave system, with moss, and other interesting plant life inside of it. Residing in the ponds in this system of caves, were the axolotls.

Experimenting
When the professor found the Axolotls, he began experimenting on them, and gathering information. In these experiments, he realized their incredible regenerative capabilities. After this, he took a handful of these axolotls. Being armed with his knowledge of genetics and magic he had aquired on his travels, along with the research he had done on the axolotls, he induced metamorphosis in them, creating the first axolotians.

Current Day
The Professor had spent much time around these axolotls. After experimenting on them, handling them, and constantly being in close proximity to the axolotls, his life is prolonged by a giant proportion, allowing him to live for thousands of years by this point, and every few thousand years, he takes another handful of axolotls, and metamorphosizing them into axolotians, to go out into the world.

Abilites
As mentioned, the axolotians have incredible regenerative capabilites, that can extend their lives indefinitely. their regeneration much more powerful than normal axolotls. They also have a fine sense of smell, since the axolotl's main method of hunting it's food is by smell. The predatory instincts of the axolotl have translated into the axolotians as well. This instinct makes axolotians competent fighters even without training. It can give them a taste for killing though. The Axolotians can also breath underwater, due to them being derived from an aquatic animal.

Weaknesses
The Axolotian cannot reproduce. The only way that their population increases is every few thousand years, when more axolotls metamorphosize into axolotians, which can be a liability to the survival of the species, if the way they are produced is ever threatened in any way. Another weakness is that though the axolotian has a healing factor that makes it practically immortal, there are ways to kill them. The only known two are if they ingest alcohol, which is known to counteract their regenerative properties, and why Ripley does not drink despite owning a bar. The second known method to severely injure or kill them, is with fire, which seems even more effective against them than a normal human.