Stronglylocentrotus droebachiensus, the green sea urchin or green urchin, is an urchin found in northern waters globally. It lives on rocky substrate in the intertidal, and down to a depth of over 200m. It is a euryhaline species, and can survive in low salinity.
Kroh, A.; Hansson, H. (2012). Strongylocentrotus droebachiensis (O.F. Müller, 1776). In: Kroh, A. & Mooi, R. (2016). World Echinoidea Database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=124321 on 2016-06-29