Den Den Mushi

Item from One Piece by Eiichiro Oda

Snail-based communication devices that serve as the phone system of the One Piece world. Living creatures that transmit and receive signals, mimicking the facial expressions of the person speaking. Different types serve different functions.

Also known as: Den Den Mushi, Transponder Snail, Snail Phone

What They Know

• Living snails used as the primary communication system across the One Piece world
• Mimic the facial expressions of the speaker in real time — each snail looks different
• Types: Regular (phone), Baby (portable), Black (wiretap), White (anti-wiretap), Golden (Buster Call)
• Golden Den Den Mushi activation triggers a Buster Call — the Marines' ultimate destructive order
• Sentient creatures with their own personalities — they can refuse to cooperate or fall asleep
• Range varies by type — some can transmit across oceans, others are short-range only

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