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The rare stenopodid shrimp, Stenopus devaneyi Goy, 1984, is reported for the first time in the Western Indian Ocean (WIO), at 60 m depth at Mayotte Island. No specimens were collected but the species is recognized confidently on photographs based on its characteristic colour pattern: two large red spots on the sides of the second abdominal somite. Selected colour photos are presented. Former Indo-West-Pacific records are listed with an updated map for the geographic distribution of this shrimp. A few ecological observations are made.