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cornish blackfish Schedophilus medusophagus Lihou 190610 ©RLLord 41 smg
Cornish blackfish Schedophilus medusophagus Lihou 190610 ©RLLord 32 smg
This egg deposit from the nudibranch Aeolidia papillosa was attached to the side of a boulder. The boulder was turned for the photograph. The egg deposit was photographed dry whereas in the previous image another Aeolidia papillosa egg deposit was photographed underwater. There were two adult Aeolidia papillosa in the vicinity of this egg deposit, which was located close to the Guernsey end of the Lihou Island causeway. File No. 090509 3882 ©RLLord fishinfo@guernsey.net
This image shows a deposit of eggs of the nudibranch Aeolidia papillosa. Two adult Aeolidia papillosa nudibranchs were seen in the proximity of two deposits of Aeolidia papillosa eggs on the upper shore near the Guernsey end of the Lihou Island causeway on 9 May 2009. Aeolidia papillosa is the largest nudibranch that regularly visits the Guernsey inter-tidal area. It feeds on anemones, particularly beadlet anemones and snakelock anemones, which are both common on the Guernsey shore. File No. 090509 3857 ©RLLord fishinfo@guernsey.net
These two adult Aeolidia papillosa nudibranchs were on the upper shore in a shallow pool near the Guernsey origin of the Lihou Island causeway on the afternoon of 9 May 2009. Near-by were two deposits of spawn. The spawn is photographed in the adjacent images. These nudibranchs feed on sea anemones - particularly beadlet and snakelocks anemones. There cerata on the dorsal surface retain the nematocysts or stinging cells of the anemones they consume. File No. 090509 3851 ©RLLord fishinfo@guernsey.net
Three flatworms are in this photograph of a small area of a compound ascidian (or sea squirt) Botrylloides sp.. The native species of this ascidian is Botrylloides leachi but the invasive ascidian Botrylloides violaceus is spreading in the English Channel and it is not yet known whether this ascidian colony is the invasive species or the native species. Dr. John Bishop and Dr. Gretchen Lambert tell me that the easiest way to tell the ascidian colonies apart is by looking at the ascidian larvae, which are not visible in this colony. World authority on ascidians, Dr. Gretchen Lambert wrote "I also wondered if the orange Botrylloides is Botrylloides violaceus. I looked very carefully at the photo but there are no visible brooded embryos, which are the best way to tell this species (apart from the native species Botrylloides leachi)." Dr. Lambert recommends that I collect some colonies, tear them apart carefully, and look for huge brooded larvae in the tunic. "They will usually be pink, no matter what the colour of the colony is." She writes "Botrylloides violaceus colonies are always a solid color--all orange, or all purple, etc. The larvae are more than 1 mm in diameter, spherical, and when mature have 24-32 lateral ampullae arranged in parallel around the anterior end like a little mop. In Botrylloides leachi the larvae are small, and brooded inside the zooids and not in the tunic." There appear to be two species of flatworm in this image of a close-up of the ascidian colony. One of the flatworms is gliding over another and heading to the lower right of the image. This image was taken south of the Lihou Island causeway on Guernsey's west coast on the 10 May 2009. The cryptic coloration of the flatworms makes them difficult to see. After 14 years of rock pooling on Guernsey's coast this is the first time I have noticed these flatworms. Their identity has not yet been determined. But they appear to be common. This link provides a possible identification, which remains to be verified: http://www.rzuser.uni-heidelberg.de/~bu6/flat0482.html File No. 100509 3973 ©RLLord fishinfo@guernsey.net
Favorinus branchialis nudibranch Lihou 100509 ©RLLord 4079 smg
Goniodoris castanea south Lihou causeway 100509 ©RLLord 4069 smg
five-spot burnet Zygaena sp. Lihou Island, Bailiwick of Guernsey, Channel Islands photographed at 1544 on 23 May 2009 ©RLLord 4316
Cornish blackfish Schedophilus medusophagus Lihou 190610 ©RLLord 32 smg
Cornish blackfish Schedophilus medusophagus Lihou 190610 ©RLLord 32 smg
Cornish blackfish Schedophilus medusophagus Lihou 190610 ©RLLord 32 smg
See photo in original gallery.
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