Phylum: Rhodophyta   Family: Dasyaceae

Heterosiphonia plumosa (Ellis) Batters, 1902

A much branched species giving a bushy appearance. Crimson from a distance but paler in close up. Found in low water rock pools and sub-tidal, growing on rocks and epiphitic on other seaweeds. Virtually all Outer Hebridean records have be recorded from the east coast

References: 
Bunker, Brodie, Maggs & Bunker (2017) - Seaweeds of Britain and Ireland;
Maggs & Hommersand (1993) - Seaweeds of the British Isles, Volume 1 Rhodophyta, Part 3A Ceramiales