Dear colleagues, X International Conference "Marine mammals of the Holarctic" dedicated to the memory of A. V. Yablokov will be held on October 29 - November 02, 2018 in Arkhangelsk. We hereby inform you that registration and submission of materials for Conference started on March 30, 2018. Submission of abstracts and materials is carried out only in electronic form through the Conference website after registration ( http://marmam.ru/en/conference/mmg-x/) (you will get the letter on your e-mail with link to pay the registration fee). Registration fees should be paid through the official conference service agency website (Monomax PCO). Deadline for submission of abstracts and materials – July 1, 2018. The Organizing Committee of the X International Conference "Marine mammals of the Holarctic" dedicated to the memory of A. V. Yablokov marmam.ru@gmail.com