According to The Lesser Key of Solomon, Decarabia (or Carabia) is a Great Marquis of Jinnestan. The original Latin form of the Pseudomonarchia Daemonum lists him as a King and Earl ("Decarabia vel Carabia, magnus Rex & Comes: venit similis *", but the English translation by Reginald Scot leaves this out for some reason. He has thirty legions of demons under his command.
Decarabia is depicted as appearing as a pentagram star, changing into a man under the conjurer's request.
Decarabia knows the virtues of all herbs and precious stones, and can change into all birds and sing and fly like them before the conjurer.