Longitude (deg): -2.4. Latitude (deg): 50.5. Longitude (deg/min): 2ð 20' W. Latitude (deg/min): 50ð 30' N. Vice county name: Dorset. Vice county no.: 9. Country: England. Stage: Worm. Identified by: Malcolm Storey. Comment: "on mud under rock, and on underside of rock, at edge of tidal pool". Category: macro-photograph. Image scaling: magnified. Background: white background. Where photo was taken: In a thin aquarium. Orientation: "Left, or facing to left". Photographic equipment used: Canon EOS400D dSLR and MP-E 65mm x1 to x5 macro lens.
Longitude (deg): -2.4. Latitude (deg): 50.5. Longitude (deg/min): 2ð 20' W. Latitude (deg/min): 50ð 30' N. Vice county name: Dorset. Vice county no.: 9. Country: England. Stage: Worm. Identified by: Malcolm Storey. Comment: "on mud under rock, and on underside of rock, at edge of tidal pool". Other taxa shown: Lineus ruber (dark reddish brown ribbon worms). Category: macro-photograph. Image scaling: enlarged. Where photo was taken: In situ. Photographic equipment used: Canon EOS400D dSLR with Tamron SP AF Di 90mm Macro 1:1 lens.
Often has this obvious reddish "brain" visible through the body wall. In Sweden they are often very pale, but in the U.K they can be considerably darker.