Advhena is a monotypic genus of glass sponges in the family Euplectellidae.

[2] Advhena magnifica was first found in 2016 by scientists on the NOAAS Okeanos Explorer on Pigafetta Guyot, east of the Mariana Trench at a depth of 2,028 metres (6,654 ft).

The genus name, Advhena, is derived from the Latin word advena, meaning alien, due to its elongated head and neck and large "eyes."

An "h" was added to the word to distinguish it from the gastropod genus Advena.

Spicules in the choanosome are diactine, meaning that they have two arms.