Xendar

The Xendar are a brutal species from the planet Xendar. They are a blue green species who have really sharp teeth and capable of shapeshifting. They conquer worlds by stripping a planet of its resources, destroying all life in the progress. The Terran Federation engaged in many raids against the Xendar to preserve the animals, plants and sentient creatures. All the Xendar were wiped out by humans in the Earth-Xendar War.