CHLOROPHYTA (green algae)
Acrosiphonia arcta
(dillwyn) J.Agardh,1846
Lenght: 2-8 cm
Width: 40-100 µm

Thallus dark-green, thin filiform, tufted and caespitose. Tufts dense, soft. Litophyte. In littoral and sublittoral in semi-sheltered localities. occuring not often. Bipolar species.