Identification edit

I question the identification of the photograph. I do not know the species myself but the description does not, in part, agree with some of the refs. Example: Hardy & Guiry 2003 note - "...superficially resembling Pelvetia caniculalis,..." and Bunker & Brodie etc 2017 note- "...Small sturdy seaweed growing ... usually to 6 to 10 cm in length...frond consists mainly of a midrib and narrow..."Osborne 13:47, 8 April 2018 (UTC) Full ref (if needed): Hardy, F.G. and Guiry, M.2003. A Check-list and Atlas of the Seaweeds of Britain and Ireland. The British Phycological Society. ISBN 0-9527115-16Osborne 14:33, 8 April 2018 (UTC)