This was a large (about 1m wide) sediment formation around rocks on the intertidal zone.
The sediment was made of coarse sand and had is covered in burrow like tubes, the opening of which were around 5mm wide.
The burrows appeared to be empty.
My inclination was that this is some sort of marine invertebrate colony?
Thanks so much Rhossilian,
Thats utterly cool,
Another example of a clearcut identification, Jade's perfectly happy with, but due to the system it's not marked as answered
Actually, it's not "due to the system" that the question is not marked as answered. It's because the author, in this case Jade, has not marked it as such when she was happy with the ID. Also, as I told you many times, I do not have time to do this job for those cases where authors don't mark their questions as answered, but I will do it as soon as I will be free.
I'm pleased you've marked this as answered, as the species dictionary shows it's a clearcut & stock case(the only 1 of the species as yet on natureplus), & so can be cited in future cases, increasing the likelihood of future questionners agreeing future like IDs. Even more so the common goose barnacle you agreed at http://www.nhm.ac.uk/natureplus/message/40181 ,but there are 2 more of the same just as clear & obvious, http://www.nhm.ac.uk/natureplus/message/16234 & http://www.nhm.ac.uk/natureplus/message/25737 would've taken only a few more seconds:- just the fact they're in large numbers proves them common goose barnacles.
However your saying you've no time for cases where authors don't mark their questions as answered seems to make no sense, as back in 2012 ( http://www.nhm.ac.uk/natureplus/message/26220 ) Jonathan said "There are only two people who can mark posts as answered (or helpful). The person who originally started the thread and a moderator of the forum (e.g. an ID team member)." ie you were specifically given the ability to do just that. Further, from your always saying "I havent the time..." etc it looks as if you're the only one doing the marking. If so why are none of the other 5 team members on the 'on the seashore forum' doing the marking? I'm sure many of the authors don't mark their questions as answered in part by reckoning 1 of these experts will.