Polycera quadrilineata(Müller, 1776)
18 April, 2014.
Inverkip Pier, Firth of Clyde on the west coast.
12 mm animal at 8 metres. Water temperature 8°C.
Sony NEX-5 in Nauticam housing, 18-55mm lens, SubSee +10 dioptre and 2 x Inon D-2000 flashes.
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