CHLOROPHYTA (green algae)
Ulvaria obscura
(Kutzing) Gayral,1964

Lenght
: 3-20 cm
Width: 1-10 cm

Thallus widely-bladed, similar to that of Ulva, turning brown on dying. Blade monostromatic. In sublittoral, at 3-17 m depth, everywhere. Occuring not often. Bipolar species.