Seriously, they just look like their owner. For example, Robin talked to Zoro through one in Dressrosa, and even the snail had a scar on its left eye. That is just weird. We even saw Kaidou talk to Scratchmen Apoo, and we know because the snail had braces. Trafalgar Law contacted Donflamingo through one as well, and this one had a hat just like his. Let's not forget Doflamingo himself had one for himself in Vergo's pocket, which was also wearing pink sunglasses.

A long time I came to the hypothesis (because I read the manga only) that with the Den Den Mushi you don't hear the actual guy's voice, but rather, the snail can imitate it perfectly to you with his facial expressions so that it is like an actor, with face and voice. Am I right?

Now I am starting to think my hypothesis was wrong because of this similarity thing.

  • I think it is just to show who is in other side, talking Dec 24, 2017 at 10:50
  • @mirroroftruth Obviously but this is just irrational. Even in One Piece, Oda, always tries to make things look logical. Braces? And a scar on the left eye? Like what is the reason for that?
    – TGamer
    Dec 24, 2017 at 23:14

2 Answers 2


If you watch the anime, you will know that they only change appearances when "online". That is, if I talk to Zoro for example, the Den Den Mushi will look exactly like he does while talking; copying his facial expressions as well.

From this link:

Literal Meaning: Electric Transmission Bug

They are used for radio communication

They have the ability to communicate with each other telepathically through radio waves. The people of the One Piece world take advantage of this ability by attaching buttons and receivers to them. According to Franky, this process is quite simple

This is how they work

Den Den Mushi will mimic the person's speech and display their emotions as well as take on the distinctive physical traits of the person on the other end. For example, when someone screams, the snail will scream as well. They also seem to be able to change their eye color and even if they lost some teeth (ex. Caesar talking over Law's Den Den Mushi) whenever someone is talking through.

You can read the wiki yourself, there doesn't seem to be a logical explanation on how they transform so much. I tried looking through the SBS but couldn't find anything useful. So right now it will have to stay a mystery.


When a person calls or speaks through a Den Den Mushi, the Den Den Mushi will mimic the person's speech and display their emotions as well as take on the distinctive physical traits of the person on the other end. In other words they don't take the appearance of their owner but rather the one that is calling, and then return to normal once the call has been terminated. Think of it like adding a picture to your contacts to know who is calling.

  • references for this information, please
    – Gagantous
    Dec 26, 2017 at 0:16
  • It calls for some suspension of disbelief, it's a manga after all. The information I literally copy-pasted from the wiki, they reference: One Piece Blue: Grand Data File, classification of Den Den Mushi, One Piece Manga and Anime — Vol. 75 Chapter 746 (p. 14) and many more. I do not thing there was any extensive explaining of the workings of den den mushi in the manga, but I could be wrong. Dec 26, 2017 at 8:39
  • But I want to know, if that is the case how can that get to have braces and eye scars? Not to mention accessories such as sun glasses or hats. I remember very well that we have seen sleeping deden mushi that still look the their owner,
    – TGamer
    Dec 30, 2017 at 2:26
  • The first sentence seems to be a direct copy-paste from onepiece.wikia.com/wiki/Den_Den_Mushi#About. Please quote the source or otherwise, it can be considered as plagiarism and be deleted.
    – Aki Tanaka
    Dec 30, 2017 at 13:51

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