Strongylocentrotus droebachiensis

Strongylocentrotus droebachiensis
Conservation status
	; Secure (NatureServe)
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Order:	Camarodonta
Family:	Strongylocentrotidae
Genus:	Strongylocentrotus
Species:	S. droebachiensis
Binomial name
	Strongylocentrotus droebachiensis; (Müller, 1776)
	Strongylocentrotus droebachiensis range
Synonyms
	List Strongylocentrotus Draebachiensis (lapsus calami); Echinus dröbachiensis O.F. Müller, 1776; Echinus droebachiensis O.F. Müller, 1776; Toxopneustes droebachiensis (O.F. Müller, 1776); Echinometra droebachiensis (O.F. Müller, 1776); Euryechinus droebachiensis (O.F. Müller, 1776); Echinus (Toxopneustes) droebachiensis (O.F. Müller, 1776); Strongylocentrotus granularis (Say, 1827 non Lamarck, 1816); Echinus subangularis Fleming, 1829; Strongylocentrotus chlorocentrotus Brandt, 1835; Echinus chlorocentrotus Des Moulins, 1837; Strongylocentrotus chlorocentrotus (Des Moulins, 1837); Euryechinus granulatus (Gould, 1841); Echinus (Toxopneustes) dübenii L. Agassiz in L. Agassiz & Desor, 1846; Echinus pictus (Norman, 1869); Strongylocentrotus pictus (Norman, 1869); ;

Strongylocentrotus droebachiensis, commonly known as the green sea urchin because of its characteristic green color, is a species of sea urchin 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.