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Subclass Opisthobranchia (including order aplysiomorpha (mainly sea hares)); sacoglossa; pleurobranchomorpha; and nudibranchia (colourful sea slugs with gills exposed on the dorsal surface.)

More nudibranch images can be seen in the Fish Quay, St. Peter Port harbour gallery at http://sealord.smugmug.com/gallery/3514928#200787061
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The nudibranch Goniodoris castanea feeding on the star ascidian Botryllus schlosseri in the Queen Elizabeth 2 marina, St. Peter Port, Guernsey on 3 September 2005. File No. 27-793 ©RLLord fishinfo@guernsey.net
This sea slug, Berthella plumula, was photographed at La Valette on Guernsey's east coast. Whereas many sea slugs visit the Guernsey shore seasonally to lay eggs this slug is seen on the shore at all times of year. I have seen it on every trip to the shore. It is usually found dry under a boulder or cobble and looks like a drop of jelly. The rhinophores are rarely visible. The body is covered in a reticulated pattern and there is a transparent area in the middle of the slug, which is said to resemble an excurrent opening (osculum) of the sponge it feeds on. This is thought to be the sponge, Oscarella sp., although some early researchers have written that the slug feeds on the star ascidian, Botryllus schlosseri. File No. 23-643 ©RLLord fishinfo@guernsey.net
The sea slug Berthella plumula is the most common sea slug to be found on the Guernsey shore. At low tide it is found on the base of boulders and cobbles that lie in tide pools. This individual was on the shore at La Valette on Guernsey's east coast just south of St. Peter Port. Dr. Bernard Picton from Ulster says that it feeds on sponges. Its appearance in this image resembles sponge tissue. It may be easily overlooked when searching for species in tide pools. File No. 26-646 ©RLLord fishinfo@guernsey.net
These reproducing sea slugs, Berthella plumula, are producing egg veils under a boulder at Albecq on Guernsey's west coast. The eggs appear as bands of jelly filled with white or yellow dots. The sea slugs overlap each other as they produce eggs. The rocky shore of Albecq has, at low water, a large shallow pool filled with a myriad of marine species. This image was taken on 10 June 2005. File No. 100605 31-779 ©RLLord fishinfo@guernsey.net
This spawn or veil of eggs belongs to the sea slug Berthella plumula. This species is found under stones in tide pools in the Guernsey intertidal area all year long. It is common. This species reproduces and deposits its eggs during May and June. This egg veil was left on the base of a granite boulder in a small tide pool shaded by overhanging rock on the mid-shore area of Belle Greve Bay on Guernsey's east coast. Photographed on the 20 May 2007. File No. BG 200507 22-905 ©RLLord fishinfo@guernsey.net
On the 19 April 2007 I found two Rostanga rubra nudibranchs under boulders at extreme low water in the centre of Belle Greve Bay on Guernsey's east coast. Rostanga rubra feeds on certain red coloured sponges. File No. 190407 16-899 ©RLLord fishinfo@guernsey.net
Goniodoris castanea south Lihou causeway 100509 ©RLLord 4069 smg
Favorinus branchialis nudibranch Lihou 100509 ©RLLord 4079 smg
On the 19 April 2007 I found two Rostanga rubra nudibranchs under boulders at extreme low water in the centre of Belle Greve Bay on Guernsey's east coast. Rostanga rubra feeds on certain red coloured sponges.
File No. 190407 16-899
©RLLord
fishinfo@guernsey.net
On the 19 April 2007 I found two Rostanga rubra nudibranchs under boulders at extreme low water in the centre of Belle Greve Bay on Guernsey's east coast. Rostanga rubra feeds on certain red coloured sponges. File No. 190407 16-899 ©RLLord fishinfo@guernsey.net
On the 19 April 2007 I found two Rostanga rubra nudibranchs under boulders at extreme low water in the centre of Belle Greve Bay on Guernsey's east coast. Rostanga rubra feeds on certain red coloured sponges.
File No. 190407 16-899
©RLLord
fishinfo@guernsey.net
filename: rostanga rubra mid-BG 190407 16-899 smg |
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Keywords: nudibranch seashore littoral intertidal rhinophores nudibranchia opisthobranchia sea slug marine invertebrate guernsey marine life british marine life channel islands marine life intertidal species sponge eater rostanga rubra 19 april 2007 rostanga rubra photo rostanga rubra image rubra photograph rubra picture rostangidae
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