Where rocky coasts merge into the water and straits are formed by currents, we also find them in the relatively
shallow Baltic Sea: drop offs leading almost vertically into the depths. At their edges we find forests of sugar kelp.
On the seabed there are colourful sponges, imaginatively shaped bryozoans and filigree hydrozoans that are host to countless other species.
Moving to the open water, with a little luck we might meet him – the harbour porpoise. The narrow channels between the larger basins of the Baltic Sea provide this marine mammal with key migration routes.