From October 12 - 14 the conference on "Sensory systems of aquatic animals" was taken place at the Marine Science Center with more than 50 participants from around the world. During the three conference days presenations covered the fields from sensory systems up to cognitive questions of pinnipeds, whales, the platypus and the starnosed mull. The topics were lively discussed about - even in the breaks and new ideas were born.