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![Periclimenes imperator (Decapoda: Palaemonidae)](http://upload.wikimedia.org/wikipedia/commons/thumb/a/ae/Periclimenes_imperator_%28Emperor_shrimp%29_on_Bohadschia_argus_%28Sea_cucumber%29.jpg/300px-Periclimenes_imperator_%28Emperor_shrimp%29_on_Bohadschia_argus_%28Sea_cucumber%29.jpg)
Periclimenes imperator (Decapoda: Palaemonidae) is a species of shrimp with a wide distribution across the Indo-Pacific that lives commensally on a number of hosts, including the sea slug Hexabranchus.