
Emperor Shrimp
Seen in Malapascua, Philippines (2012). Photo by Mark Bockstael (my husband).
Comensal shrimp (Palaemonidae) that can grow to 2 cm (3/4 in.). Typically red with prominent white pattern on head, back and tail. Orange claw arms with purple claws and joints. Comensal with several species of sea cucumbers and larger nudibranchs. Feed on detritus picked from the sea floor.
Habitat: The emperor shrimp has a wide distribution across the Indo-Pacific. They live in water up to 45 metres (148 ft) in depth.

The emperor shrimp 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 to 7.6 millimetres , and found ''Periclimenes rex'' to be its best resemblance.