google :shrimp + parasite(寄生蟲)不知道是不是這個......Bopyroides hippolyteshttp://www.wallawalla.edu/academics/departments/biology/rosario/inverts/Arthropoda/Crustacea/Malacostraca/Eumalacostraca/Peracarida/Isopoda/Epicaridea/Bopyroides_hippolytes.html