A yukkurarium may be small enough to sit on a desk or table, especially one built for Pet Yukkuris bred to stay small for their entire lifespan (Mini-Yukkuris), or may be a larger structure, possibly outdoors. Some Yukkurariums may be adapted for a single species or a smaller group of yukkuris: for example an Aquatic Marisa may enjoy a yukkurarium with large bodies of water, whereas a common yukkuri would be repulsed and scared by it.