Motts are small, stubby-legged quadrupeds that can sometimes be heard snuffling in the mudbanks and grasses of the Naboo swamps
Motts are semi-aquatic herbivores that dwell in underground mudbank burrows. They are preyed upon by a wide variety of other beasts -- including the Gungans -- but their high reproductive rate keeps them surviving. These creatures are very good swimmers.
The mott can be spotted during the swamp stampede sequence of Episode I, as well as the arrival at the Gungan Sacred Place later in the film. In both cases, the creature is realized as a computer generated creation.