Strongylocentrotus droebachiensis is commonly known as the green sea urchin because of its characteristic green color. It is commonly found in northern waters all around the world including both the Pacific and Atlantic Oceans to a northerly latitude of 81 degrees and as far south as Maine (in the U. S. ) and England. The average adult size is around 50 mm (2 in), but it has been recorded at a diameter of 87 mm (3. 4 in). The green sea urchin prefers to eat seaweeds but will eat other organisms. They are eaten by a variety of predators, including sea stars, crabs, large fish, mammals, birds, and humans. The species name "droebachiensis" is derived from the name of the town Drøbak in Norway.

Strongylocentrotus droebachiensis. Retrieved May, 08 2021, from en.wikipedia.org/wiki/Strongylocentrotus_droebachiensis.