Ulva linza Linnaeus
Also known as Enteromorpha linza
Description: Thallus bright grass-green with an unbranched ribbon-like strongly compressed frond up to 30 cm long, generally with a frilled or scalloped margin; hollow above but tapering gradulally below into a distinct, solid stipe below
Habitat: Rock pools and growing on shells in damp depressions in the mid and lower intertidal, particularly in places affected by sand.
Distribution: Common through Britain and Ireland; North Atlantic and Mediterranean; seeminly widely distributed throughout the world.
Similar species: Ulva (Enteromorpha) compressa which is generally compressed, but hollow throughout and without scalloped edges.