Reek

From Fettipedia

A gigantic horned beast as seen in the arena on Geonosis

Home World: Ylesia; Codian moon ranches

A Reek was one of three deadly beasts sent in to kill Anakin Skywalker, Padme' Amidala and Obi-Wan Kenobi after they had been captured on Geonosis.

The reek who had been tamed by Anakin was later killed by Jango Fett who took it down with his blaster pistols.