Phylum: Rhodophyta   Family: Ceramiaceae

Ceramium botryocarpum A.W. Griffiths ex Harvey, 1848

An epiphyte on more persistent seaweeds but occasionally on rocky substrates. Found in more sheltered sites such as rock pools in the intertidal zone

References: 
Maggs & Hommersand (1993) - Seaweeds of the British Isles, Volume 1 Rhodophyta, Part 3A Ceramiales