Where do den den mushi come from?


Is it ever explained where the den den mushi come from?

We know there are all kind of den den mushi variating in colors as well in
functions. But do they originate from a devil fruit user or are they just some
random existing creature in the One piece universe ? ![enter image description
here](https://i.stack.imgur.com/fGR8J.png)




Den den mushi are kind of snails used for visual and audio communication. They
are just another type of random creature existing in OPverse which uses
telepathic abilities for communication within their own kind.

[Source](http://onepiece.wikia.com/wiki/Den_Den_Mushi)




Den den mushi are kind of snails used for visual and audio communication. They
are just another type of random creature existing in OPverse which uses
telepathic abilities for communication within their own kind.

[Source](http://onepiece.wikia.com/wiki/Den_Den_Mushi)

