Robuta

https://alaskasealife.org/alaska_species/51 Green Sea Urchin - Alaska Sealife Center green sea urchin alaska sealife center https://dalspace.library.dal.ca/items/b5447e99-5329-4cc8-a2da-7420bd5d05f7/full Outbreak dynamics of the green sea urchin Strongylocentrotus droebachiensis O. F. Muller. green sea urchin of the