Dennis Brennecke graduated with a Bachelor of Science in biology at the University of Rostock and completed his Master of Science in biological oceanography at GEOMAR - Helmholtz Centre for Ocean Research Kiel (Germany). He is a doctoral candidate through the University of Veterinary Medicine Hannover, Foundation, and the University of Southern Denmark, with main focus on the bycatch of harbour porpoises. He is also part of an European citizen science project (Plastic Pirates - GO EUROPE) and the leader of the ocean:lab at Kiel Science factory belonging to the Leibniz Institute for Science and Mathematics Education at the University of Kiel (Germany).

Katrin Knickmeier studied biological oceanography, marine chemistry and zoology at the University of Kiel, Germany. She worked at the Institute for Polar Ecology, University of Kiel and participated in numerous scientific expeditions to the Arctic, Atlantic and Pacific Ocean and the Amazon. During her Ph.D. she worked on plankton at the rocky coasts of Chile in Coquimbo (Universidad Catolica del Norte). She coordinates a European citizen science project (Plastic Pirates - GO EUROPE) and is the leader of Kiel Science factory, belonging to the Leibniz Institute for Science and Mathematics Education and the University of Kiel (Germany).

Iwona Pawliczka studied oceanography and marine biology at the University of Gdäsk, Poland. As a student she initiated research on harbour porpoises in Poland. She continued with research at Hel Marine Station, Institute of Oceanography, University of Gdäsk. She initiated a seal rehabilitation project and leads the marine station's grey seal recovery project. She got her PhD in oceanology at the University of Gdäsk, studying the status, biology and threats to harbour porpoise in Polish waters. She has been a leader of citizen science projects that successfully initiated a marine mammal stranding scheme in Poland. Iwona is Assistant Professor andacademic teacher at the University of Gdäsk and a head of Hel Marine Station, which runs several research and education projects with special emphasis on marine mammal - fishery conflicts.

Ursula Siebert studied veterinary medicine at the Justus-Liebig-University Giessen (JLU) (Germany) and the Ecole National Vétérinaire de Nantes (France). She conducted her PhD in Ecotoxicology and the Free University of Brussels (Belgium) and the JLU and specialist further in pathology and aquaculture. She was leader for the research group for marine mammals and sea birds at the Research and Technology Center Westcoast, Christian-Albrechts-University (CAU) of Kiel (Germany) and was responsible veterinarian for harbour porpoises and seals at Fjord&Bælt (Denmark). She habilitated in the field of zoology on anthropogenic effects on marine mammals at the CAU. Since 2011 she is the director of the newly founded Institute for Terrestrial and Aquatic Wildlife Research at the University of Veterinary Medicine. She is Diplomate of the European College of Zoological Medicine - Wildlife Population Health and Diplomate of the European College of Aquatic Animal Health. She is honory professor at the Aarhus University Denmark since 2014.

Magnus Wahlberg studied physics and biology at Göteborg University (Sweden). He worked on seal-fishery conflicts at the Institute of Coastal Research (Sweden) and as a high school teacher. He got his PhD in marine bioacoustics at the University of Southern Denmark, with main focus on sperm whale sound production. After post docs and research visits at Aarhus University (Denmark), Woods Hole Oceanographic Institution (US) and Tjärnö Marine Biological Laboratory (Sweden), Magnus worked as scientist at Fjord&Bælt (Denmark), with special emphasis on harbour porpoise bioacoustics. He is Associate Professor (University of Southern Denmark) and daily leader of the Marine Biological Research Center in Kerteminde, Denmark, specializing in the acoustic behaviour and hearing of marine mammals.

Highly-readable Open Access introduction to marine mammal biology and medicine

Presents career pathways of marine scientists illustrated by exciting case studies

Discusses human-derived threats to oceans and animals