Vampire

A Vampire (Homo Amphibia) is a type of amphibious humanoid from the planet Layohla that drink Human blood. They have access to just a bit more advanced technology than Earth, capable of flying to and from their moons with ease, and from a barran gas giant in a nearby system they can withdraw useful gas and a supply of chrome capable of lasting their planet about six hundred years at their current consuming rate.

History
The first Vampires on Earth were a coven of seven. They salvaged the technology from a crashed TARDIS and have now bred a wide ecosystem on the planet.

Biology
Vampires are extremely fast and strong and drink the blood of animals. Despite being low in energy, Human blood is the best. They can drain a human in instants.