bobthebirder's picture

Bryozoan on a hydrozoan!

Observed: 23rd November 2012 By: bobthebirderbobthebirder is knowledgeable about Invertebratesbobthebirder’s earned reputation in Invertebratesbobthebirder’s earned reputation in Invertebratesbobthebirder’s earned reputation in Invertebratesbobthebirder’s earned reputation in Invertebrates
DSCN4581
Description:

I could be completely wrong here, and this might be just one organism, but what I believe this to be is a long feathery hydrozoan with a leafy bryozoan growing on it. Washed up on beach after a stormy night, see http://www.ispot.org.uk/node/306081 and http://www.dorsetwalks.com/reports/portland.htm

Identifications
Species interactions

No interactions present.

Comments

dejayM's picture

Airing

What a shame this has sat for years without Comment. It is remarkable observation and one that deserves an airing.
I need to come back, but have missed this because it is not marked as a Marine Organism only a coastal one.
Whilst it is entirely my fault for not browing Coastals, the filter reveals far too many non-marines - see http://www.ispotnature.org/taxonomy/term/41
I am of a strengthening opinion that Marine Organisms should be marked (tagged) marine. Coastal is quite correct for the Habitat found in (in some ways) but the desciptive tag Marine is essential for completeness.
I'll try to get back.

JoC's picture

Hydroid and bryozoan

I think this is an unusual post and therefore of special interest.
This hydroid post shows a pinnate structure with the hydrocladia ( branches) being rather one-sided. A couple of hydroids with this one-sided look like this are Lytocarpia myriophyllum and Aglaophenia tubulifer.
http://www.marinespecies.org/photogallery.php?album=674&pic=1790

http://www.marinespecies.org/aphia.php?p=image&pic=82278

Their hydothecae ( polyps) are different, but that's not visible here.

Whatever the species, I think the hydroids are probably growing on the flat encrusting basal part of Flustra which form initially begore Flusta become an erect colony.
EDIT 2.3.17. Thanks dj; I did not notice the 'partner' post at http://www.ispotnature.org/node/306081 I may continue a comment there on the hydroid.

Jo

dejayM's picture

& Gymnangium montagu

No doubts about Flustra foliacea.
Partnered with http://www.ispotnature.org/node/306081 - close inspection Jo shows the (proposed) hydroid not to be 'one sided'
Nice Bob
PLEASE add the 2 tags ProjectM1 and Marine
ðerek