A new article 'Out of Sight, Out of Mind: How Conservation Is Failing European Porpoises' has been published in Frontiers in Marine Science (open access) as part of the research topic 'Small Cetacean Conservation: Current Challenges and Opportunities'. The article stresses the vulnerability of the harbor porpoise in European seas and especially in the Baltic Sea, the Black Sea and in the waters of the Iberian Peninsula off Portugal and Spain, and call for urgent action, especially in relation to bycatch.