ORIBATID MITES [moss mites]
(Oribatida sp)
Oribatid mites mostly feed on fungi, bacteria and decomposing plant matter, thereby playing an important role in decomposition, nutrient cycling, and the formation and maintenance of soil structure. In fact, researchers frequently use the number of oribatid mites present in soil samples to determine the health of the soil.
These amazing mites play a very important role in the terrarium where they assist in breaking down organic matter, which makes it bio-available to your plants. A bonus feature is their presence in your soil food web serves as competition for  pest species, making them less likely to establish. Oribatid mites will even clean up waste matter that could otherwise harbor fungal or bacterial pathogens in your substrate.