Periclimenes

Periclimenes
Periclimenes imperator
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Malacostraca
Order: Decapoda
Suborder: Pleocyemata
Infraorder: Caridea
Family: Palaemonidae
Genus: Periclimenes
Costa, 1844 
Type species
Periclimenes amethysteus
(Risso, 1827) 

Periclimenes, commonly known as glass shrimp or cleaner shrimp, is a symbiotic and often commensalistic genus of translucent shrimp within the family Palaemonidae. Species of this large genus feature a wide variety of coloration and patterns, widespread distribution throughout much of the world's tropical oceans, and are often sought out for aquarium trade.