In One Piece, Den Den Mushi are living snails fitted with telephone receivers that characters use instead of phones, a quirk that has been part of the series since its early adventures. When one rings, its shell and receiver vibrate with a distinctive old-telephone tone that fans immediately associate with the Straw Hat crew receiving orders, warnings, or news from allies. Clips of that ring have circulated widely in anime edits, reaction videos, and short-form memes, where it signals an incoming call without any dialogue. Its staying power comes from that instant, cross-language recognition among One Piece fans.