Facciolella castlei is an eel in the family Nettastomatidae (duckbill/witch eels).

[2] It was described by Nikolai Vasilyevich Parin and Emma Stanislavovna Karmovskaya in 1985.

[3] It is a marine, deep water-dwelling eel which is known from Chile, in the southeastern Pacific Ocean.

The type specimen was retrieved from a depth of 230 metres.

[2] This Anguilliformes article is a stub.