In 1987 a team of the Research Institute Tethys started a long research of biology, ecology and social structure of the community of bottlenose dolphins that colonize the sea around the islands of Cres and Losinj. Today these dolphins are one of the best-explored groups in the whole Mediterranean.
The size of the community is estimated at 120 individuals.
Most of the individuals can be identified by photographs thanks to natural marks such as cuts and scars on their back fin, the part which is always to be seen when they come out to the surface to breath the air.
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