Tenellia caerulea (Montagu, 1804)

03 July, 2005.
South Gortein, Loch Fyne on the west coast .
This animal approx 15mm was found at 13 metres on the cable as it passes over the top of the reef. Water temperature 11° C.
Fuji 810 in Ikelite housing and Inon 165 close up lenses with 2 x Inon D-2000 slave flashes.