Hello and thank you for your report! It's true that this crab has a green cast, but it is a native, striped shore crab (see https://www.inaturalist.org/taxa/47188-Pachygrapsus-crassipes/browse_photos for lots of photos- they can vary a lot). European Green Crabs have five spines on each side of their heads - here is another resource for comparision, http://www.adfg.alaska.gov/static/species/nonnative/invasive/pdfs/crabs_identification_guide_sea_grant_oregon.pdf. Thanks again for checking with us!

Lindsey Wise
May 17, 2018, 3:15 a.m.