The Avocadians are an extraterrestrial humanoid species who originate from the planet Guac-9. They are a highly intelligent species that live by logic and reason with no interference from emotion. They were the first documented extraterrestrial species to make contact with humans, during the famous 2330 - 2338 expedition of Cosmonaut Captain Lavin.​ Avocadoists (of the Earth religion Avocadoism) argue that first contact was made centuries earlier via an ancient Earth structure known as the Avocado.

​

Avocadoists believe prehistoric cave drawings indicate that thousands of years ago, Avocadians visited planet Earth, where they taught ancient humans about technology, founding their religion.