The emperor shrimp (Periclimenes imperator) is a species of shrimp with a wide distribution across the Indo-Pacific. It lives commensally on a number of hosts, including the sea slug Hexabranchus. A. J. Bruce first described it in 1967 based on eight specimens ranging from 4 millimetres (0.16 in) to 7.6 millimetres (0.30 in), and found Periclimenes rex to be its best resemblance.
- Sammy De Grave (2010). "Periclimenes imperator Bruce, 1967b". World Register of Marine Species. Retrieved November 28, 2010.
- John B. Shoup (1972). "Notes on the behavior of Periclimenes imperator Bruce, an ectocommensal on the dorid nudibranch Hexabranchus marginatus Quoy & Gaimard (Decapoda, Palaemonidae)". Crustaceana 23 (1): 109–111. doi:10.1163/156854072X00101.
- A. J. Bruce (1967). "Notes on some Indo-Pacific Pontoniinae III-IX. Descriptions of some new genera and species from the western Indian Ocean and the South China Sea" (PDF). Zoologische Verhandelingen 87: 1–73.
- "Periclimenes imperator A. J. Bruce, 1967; emperor shrimp". Encyclopedia of Life. Retrieved January 19, 2012.
- "BlueZoo". Retrieved January 19, 2012.