Selachee

The Selachee are a species of small humanoid aliens with some features in common with Earth's sharks. They act as intergalactic bankers who invest in planets/species in hopes of a long term return in profit.

Biology
They look similar to the common Greys, but can be distinguished by shark-like traits such as the presence of microscopic scales, multiple rows of serrated teeth, and a preference for extremely humid environments.

History
After Earth destroyed the home planet of the Psychlos, a galactic power vacuum instigated a siege of Earth by the military forces of the races that were subjugated by the Psychlo Empire. The Selachee bankrolled Earth's defense budget and convinced other races to support a plan to make Earth the new seat of galactic banking in place of planet Psychlo, thus making the planet a galactic protectorate.

Appearances

 * Battlefield Earth, by L. Ron Hubbard (1982)