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Never Mess With a Sea Hare

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Sea hares don't look like they can put up much of a fight, but these bunny-eared slug cousins can really knock you senseless. When disturbed, sea hares (genus Aplysia) release a dark purple cloud that's made up of ink and a sticky, milky mix of chemicals called opaline that not only frightens and distract predators, but also interferes with their sensory organs and blocks their chemical receptors.

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