Transponder Snails, known as Den Den Mushi, are living communication devices in One Piece. They appear throughout Eiichiro Oda’s manga and its anime adaptation, carrying conversations across long distances while often reflecting the speaker’s expressions. Short clips based on their calls became useful in fan edits, reaction videos, and custom notification setups because they are instantly recognizable to series viewers. This accept-call cue remains useful as a compact reference to the franchise’s distinctive approach to telephones and remote communication.