Haloa japonica

Haloa japonica, common name the Japanese bubble snail, is a species of sea snail or bubble snail, a marine opisthobranch gastropod mollusc in the family Haminoeidae, one of the families of bubble snails.

Distribution
The species is found in the Pacific Ocean, Mediterranean and North Sea:
 * Japan
 * Korea
 * Hong Kong
 * The Philippines
 * Thailand
 * Mediterranean Sea including Sète and Étang de Berre, France
 * California and Washington, USA
 * Southern British Columbia, Canada
 * Taiwan
 * Netherlands (incl. Zeeland)

Description
Their shells have length around 11 mm and width around 8 mm.

Parasites
The parasites of Haloa japonica include an avian schistosome, which has been implicated in human cercarial dermatitis in San Francisco Bay, California.