Argulus japonicus
•Genus referred to as “Fish lice” and more specifically the “carp louse”
•Parasitic primarily on fishes (bloodmeal)
•Found worldwide, 23 species in US (fresh water and marine)
•A. japonicus native to SE Asia
•Introduced with shipments of goldfish
•Fox River in Wisconsin (1988) (Mills et al. 1993)
Kevin Charton
This is a new animal I just learned about, the carp louse.  It parasitizes fish primarily.  This group is found worldwide with 23 freshwater and marine species in US waters. However this species is native to SE Asia.  It has been spread to other continents with shipments of goldfish. According to William Poly at the California Academy of Sciences, it has been found in these states. In Africa, they are parasitizing rainbow trout in culture facilities.