Zenopontonia rex was previously known as Periclimenes imperator. The Emperor shrimp Inhabit various coral reefs, lives commensally on a number of hosts, including cucumbers and seaslugs. Zenopontonia rex has a wide distribution across the Indo-Pacific.
Periclimenes (Periclimenes) rex Kemp, 1922
Periclimenes imperator Bruce, 1967
Periclimenes rex Kemp, 1922