Locality:
Grevelingen, The Netherlands

Literature for identification (localities mentioned):
Kott, 2001; p. 339 (Western Australia, South Australia, North Sea, Irish Sea, English Channel, Mediterranean Sea, Adriatic Sea, Atlantic Ocean, South Africa, Indian Ocean, California, Japan, etc.)
Monniot et al, 1991; p. 120 (New Caledonia)

Grevelingen The Netherlands

Britain / Ireland
from Ulster Museum webpage

Croatia

U.S. west coast
from Stachowicz Lab Website

U.S. west coast
from Stachowicz Lab Website

U.S. west coast
from Stachowicz Lab Website

U.S. north east coast

U.S. north east coast

U.S. north east coast

U.S. north east coast

west east Atlantic grey transparent colonial tropical