Bardsey Island lies at the heart of a key area for marine mammals. The surrounding waters are regularly used by harbour porpoises, bottlenose dolphins, Risso’s Dolphins, common dolphins and Minke whales.

The island is surrounded by the West Wales Marine SAC designated for harbour porpoises, and the Pen Llŷn a’r Sarnau SAC for which bottlenose dolphins and grey seals are features. Grey seals are also a feature of Bardsey's National Nature Reserve designation. Risso’s dolphins are regularly seen in the area which is unusual as they are typically found offshore.

The aim of the project is to study the marine mammals in the area to provide clear information on their status, and to understand how and why they use these waters. This will inform conservation measures to better protect these important species.

The project is;

• Increasing systematic recording of marine mammals around Bardsey Island and the Llŷn Peninsula. A Science Officer is based on the island during the summer months and a team of volunteers will be recruited and trained on the mainland. Everyone will use Whale and Dolphin Conservation’s Shorewatch citizen science methodology to build up a long-term data set and set a new standard for systematic recording in the area.
   
• Utilising drone technology to photograph Risso’s dolphins. Very little is known about the distribution and life cycle of these dolphins. The images collected will contribute to a catalogue of individuals identified by the unique patterns on their dorsal fins, helping to increase our understanding of this species.
   
• Engaging with local communities and visitors to raise awareness of the importance of the area for a range of marine mammal species, the factors impacting them, and how they can get involved in conservation efforts.