A. occultus

A. occultus may refer to:
 * Anolis occultus, a lizard species
 * Arion occultus, a small air-breathing land slug species
 * Antrodiaetus occultus, a floor trapping spider species in the genus Anthrodiaetus and the family Antrodiaetidae
 * Aprostocetus occultus, an insect in the genus Aprostocetus