Rhodymenia delicatula P.J.L.Dangeard
Description: Fleshy, dark red, flattened fronds, irregularly ovate-lanceolate, simple or branched, to 20 mm high and 3 mm broad. One to several fronds with cylindrical stipes to 5 mm long arise from small fleshy disc. Irregular branched coralloid processes frequent on fronds, readily detached and possibly capable of serving for vegetative propogation.
Habitat: In cracks and crevices, lower intertidal and subtidal, southern and western coasts, probably widespread, but frequently overlooked.
Similar species: Erythrodermis traillii
Photograph: Rathlin Island, Co. Antrim, Ireland © Francis Bunker (plants to 10 mm long).