Godzilla Filius is the younger, smaller Godzilla encountered in Godzilla: Planet of the Monsters, the first film in Toho's anime Godzilla trilogy released in 2017. While the original Godzilla Earth remains dormant, Filius serves as the active threat humans face on a reclaimed Earth, and its roar became a distinctive marker of that version of the monster. The clip has since circulated on soundboards and in fan edits, where creators reuse it as a standalone monster sound for reveals, battles and dramatic moments, keeping it popular beyond the film itself.