Blue-Ringed Octopus Blue

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The Blue-Ringed Octopus is one of the most venomous species of cephalopod on the planet. The iridescent blue rings are conspicuous coloration, evolved to warn potential predators a way from this little octopus and its potent venom. This color ink is formulated to mimic the vibrant electric blue of the Blue-Ringed Octopus. Each bottle has 45 ml of ink, and a wide mouth for easy filling of your favorite pen. Show more