Dear all, Sorry for cross-posting. One of my friends living in Igneada, a town on the western Black Sea coast of Turkey and very close to the Bulgarian border, saw a group of 5-6 bottlenose dolphins, travelling about 100 m offshore from north to south, at 11:00-12:00 on 3 December. He saw something like a tag or a plate at the base of dorsal fin of one of the dolphins. He noticed it as it was shiny, reflecting the sun rays. He observed it with binoculars and claims it was as big as 20 cm or so. Does anybody know if there is any tagged bottlenose dolphins in the Black Sea (or possibly in the Aegean Sea)? To my knowledge, there is none in Turkey. It could be a harness for TDR or some acoustic device. Please contact me if you know such study going on. I can provide the exact location if requested. Ayaka Amaha Ozturk Faculty of Fisheries, Istanbul University Turkish Marine Research Foundation (TUDAV)