Goniodoris
castanea Alder & Hancock, 1845| Date: | 16 July , 2021 |
| Location: | Near the wreck of the SMS Karlsruhe, Scapa Flow, Orkney Islands off the NE coast. |
| Approx size: | 50 mm animal with massive egg spiral around the top of the rock. |
| Depth: | 26 metres |
| Water temperature: | 10°C. |
| Other info: | Sony α6000 in Nauticam housing, Zeiss 50 mm macro lens and 2 x Inon D-2000 flashes. |