Distribution in scandinavian waters

Maximum length: 5-10 cm.
Appearance: Bright green in colour. Slender at the root, and grows wider towards the top (funnel shaped), with splits down the side. Seen under a microscope, Monostroma grevillei has a single celled layer, as opposed to sea-lettuce with its two celled layer.
Depth: 0-1 m.
Environment: Monostroma grevillei generally grows on rocks and cliffs or large algae.
Misc: It occurs during the late winter to early spring and reproduces during March to May.
Classification: Monostroma grevillei is a member of the green algae group.