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An open-source atlas of the world's dive sites and the marine life seen at each one.

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Blue-ringed Octopus (Hapalochlaena lunulata) · OpenDive Atlas

Marine lifeBlue-ringed Octopus

Blue-ringed Octopus

Photo © Jens Petersen / Wikimedia Commons · CC BY 2.5 · Source

Blue-ringed Octopus

Hapalochlaena lunulata

CephalopodsIUCN Least Concern

Tiny octopus whose blue rings flash as a warning; its venom is deadly. Never touch it.

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