Leftvents are small, deep-sea lophiiform fish comprising the family Linophrynidae distributed throughout tropical to subtropical waters of all oceans. The name of the type genus Linophryne has been translated from the Greek to mean "toad that fishes with a net", an allusion to the fishes' impressive use of mimicry in luring prey. One of several families of anglerfishes, the Linophrynidae are not well studied, and only one species is given a common name: the netdevil, Borophryne apogon. For this reason, the name "netdevil" can sometimes refer to any linophrynid.