A Duct-ape.
Explanation: This joke cleverly combines the terms “duct,” from “duct tape,” with “ape,” referring to the gorilla. The punchline, “Duct-ape,” plays on the similarity in sound between “duct-ape” and “duct tape,” a widely recognized adhesive product. The humor arises from the unexpected wordplay, as it evokes a funny image of a gorilla stuck in a ventilation shaft while also referencing the practical use of duct tape, creating a light-hearted and amusing connection.