Favorinus branchialis nudibranch Lihou 100509 ©RLLord 4079 smg
These two nudibranchs, Facelina auriculata, were collected from the side of a fish quay pontoon in St. Peter Port harbour, Guernsey.  They were placed in an aquarium for photography.  As they met they embraced each other and stayed together for about a minute or so before moving off in separate directions.  They were returned to St. Peter Port harbour after photography.
Facelina auriculata union fish quay 090307 3-887
©RLLord
fishinfo@guernsey.net
The sea hare, Apylsia depilans, glides along the gravel floor of a rock pool in Belle Greve Bay on Guernsey's east coast.  This sea hare is about 20 cm long when fully extended and weighed 162 grams.  Sea hares graze on seaweeds.  Aplysia punctata is common on the Guernsey shore in the spring but this species, Aplysia depilans, is seen rarely.  It is a more southern species found on the Brittany coast of France.

File No. BG 250108 2507 
©RLLord
fishinfo@guernsey.net
Aplysia deplians BG pool 250108 2503 smg
Two nudibranchs meet and mouth each other - Facelina auriculata on the left and Facelina bostoniensis on the right. They are gliding over erect bryozoan colonies and a Mogula ascidian on the lower edge and in the middle of the image.  They were feeding and laying egg veils on the side of the pontoon attached to the fish quay in St. Peter Port harbour, Guernsey on the 8th June 2007.
File No. 080607 11-917
©RLLord
fishinfo@guernsey.net
This image shows a close-up of the head of Facelina bostoniensis.  The rhinophores are furnished with rings (annulate).  The oral tentacles are very long and partially curled in this image. The brown digestive gland shows through the transparent cerata that cover the dorsal surface of the nudibranch.  This species was feeding and laying egg veils on the side of a pontoon attached to the fish quay in St. Peter Port harbour, Guernsey on the 8th June 2007.
File No. 080607 18-917
©RLLord
fishinfo@guernsey.net
This nudibranch, Facelina auriculata, was one of three species of sea slug I saw feeding on the side of a pontoon attached to the fish quay in St. Peter Port harbour, Guernsey on 8 June 2007.
File No. 080607 20-917
©RLLord
fishinfo@guernsey.net
The nudibranch, Facelina auriculata, gliding over the invertebrate fauna growing on a pontoon attached to the fish quay in St. Peter Port harbour, Guernsey. Behind Facelina auriculata is the sea slug Facelina bostoniensis.  Photographed on the 8 June 2007.
File No. 080607 7-917
©RLLord
fishinfo@guernsey.net
This beautiful nudibranch, Facelina annulicornis, was seen on the side of the pontoons attached to the fish quay in St. Peter Port harbour, Guernsey on the 8th June 2007 along with two other sea slug species.  The other species can be seen in the distance - Facelina bostoniensis and Facelina auriculata.  Dr. Bernard Picton in his excellent book "A Field Guide to the Nudibranchs of the British Isles" writes that Facelina annulicornis has been known to attack and consume some other sea slug species.
File No. 080607 12-917
©RLLord
fishinfo@guernsey.net
Favorinus branchialis nudibranch Lihou 100509 ©RLLord 4079 smg
Favorinus branchialis nudibranch Lihou 100509 ©RLLord 4079 smg
Favorinus branchialis nudibranch Lihou 100509 ©RLLord 4079 smg
See photo in original gallery.