Muckwalker
native to an unspecified swamp world, the muckwalker was domesticated by the natives for use as a mount. Muckwalkers congregate in large herds, using their numbers for protection against predators. When attacked, a muckwalker used its heavy tail to lash out at its attacker. Despite their name, muckwalkers were better swimmers than they were runners, a trait which stemmed from their evolution in the swampy environment. These creatures also had excellent night vision, and used a form of echolocation to augment their perception.