Baltic Sea

Harbour porpoise. © Maren Reichelt / Sea Watch Foundation
Harbour porpoise. © Maren Reichelt / Sea Watch Foundation

International Day of the Baltic Harbour Porpoise: Celebrating a Unique Baltic Species

This Sunday, 17 May 2026, marks the International Day of the Baltic Harbour Porpoise (IDBHP), observed each year on the third Sunday of May. Introduced in 2002 by ASCOBANS, the Agreement on the Conservation of Small Cetaceans of the Baltic, North East Atlantic, Irish and North Seas, the day exists for one reason: to remind us that the Baltic Sea's only native cetacean is running out of time.
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Harbour porpoise. Photo by Tilen Genov / Morigenos
Harbour porpoise. Photo by Tilen Genov / Morigenos

Bycatch, Underwater Noise, and Offshore Wind Impacts Dominate JG22 Agenda

The 22nd Meeting of the Jastarnia Group (JG22) was held online from 14–16 April 2026, bringing together representatives of Baltic Sea Range States, partner organizations and experts. Across a series of thematic sessions, participants exchanged updates on research projects, shared recent findings from relevant studies, and discussed policy amendments. The meeting aimed to review progress on implementing the Jastarnia Plan and the Belt Sea Plan as well as identify actions to strengthen protection efforts for the harbour porpoise in the Baltic Sea.
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https://www.marinemammalhabitat.org
https://www.marinemammalhabitat.org

Creation of 33 new Important Marine Mammal Areas in the North East Atlantic Ocean and Baltic Sea

Important Marine Mammal Areas (IMMAs) are defined as discrete portions of habitat, important to marine mammal species, that have the potential to be delineated and managed for conservation. Now, 33 new IMMAs have been created in the North East Atlantic Ocean and Baltic Sea by the IUCN Marine Mammal Protected Areas Taskforce.
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Harbour porpoise. Photo © Hanna Michel.
Harbour porpoise. Photo © Hanna Michel.

Article Published on Negative Trends in the Vulnerable Harbour Porpoise Population Showing Urgent Need for Action

A new paper, 'A negative trend in abundance and an exceeded mortality limit call for conservation action for the Vulnerable Belt Sea harbour porpoise population', has been published in Frontiers of Marine Science (open access). The study found that over the past 18 years, there has been a strong negative trend in abundance of the vulnerable harbour porpoise (Phocoena phocoena) population in the Belt Sea due to bycatch.
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JG20 participants. Photo © ASCOBANS Secretariat.
JG20 participants. Photo © ASCOBANS Secretariat.

20th Meeting of the ASCOBANS Jastarnia Group in Zandvoort

From 13 to 15 March 2024, Zandvoort, Netherlands, was the host to the 20th Meeting of the ASCOBANS Jastarnia Group, a gathering aimed at advancing the conservation of the harbour porpoise in the Baltic. This annual meeting brought together members of the Steering Group for the ASCOBANS Recovery Plan for Baltic Harbour Porpoises, commonly known as the Jastarnia Plan, alongside representatives working on the Conservation Plan for the Harbour Porpoise Population in the Western Baltic, the Belt Sea, and the Kattegat.
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© Tilen Genov, Morigenos
© Tilen Genov, Morigenos

19th Meeting of the Jastarnia Group

The 19th Meeting of the Steering Group for the ASCOBANS Recovery Plan for Baltic Harbour Porpoises (Jastarnia Plan) and the Conservation Plan for the Harbour Porpoise Population in the Western Baltic, the Belt Sea and the Kattegat (Western Baltic Conservation Plan) took place online from 20 to 22 March 2023. Chaired by Dr. Ida Carlén, progress on the implementation of the Jastarnia and the Western Baltic Conservation Plan was discussed. Country representatives provided an overview of national activities to conserve the harbour porpoise since the last meeting .
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© PGH Evans
© PGH Evans

Call for Expressions of Interest: Coordination of the Jastarnia and WBBK Plans

The ASCOBANS Secretariat is welcoming Expressions of Interest (EOI) from organisations and individuals to provide technical coordination for the implementation of the ASCOBANS Recovery Plan for the Baltic Harbour Porpoises (Jastarnia Plan), and ASCOBANS Conservation Plan for the Harbour Porpoise Population in the Western Baltic, the Belt Sea and the Kattegat (WBBK Plan).
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JG18 in full swing. ©  Jenny Renell, ASCOBANS Secretariat
JG18 in full swing. © Jenny Renell, ASCOBANS Secretariat

18th Meeting of the Jastarnia Group

For the first time in nearly three years, participants could gather for a face-to-face meeting of ASCOBANS again. The 18th Meeting of the Jastarnia Group took place in Gothenburg, Sweden, from 28 to 30 March 2022, and was also attended by a small number of online participants.
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Schweinswale werden bei Munitionssprengungen oft tödlich verletzt

Translation from German:

Harbour porpoises are often fatally injured in munitions detonations

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© F. Hobson / Sea Watch Foundation
© F. Hobson / Sea Watch Foundation

Analysis on Bycatch Mitigation Measures and Alternative Fishing Methods Published

A new ASCOBANS report detailing a cost-benefit analysis for mitigation measures in fisheries with high bycatch is launched today.  The report, authored by Fiona L. Read, reviews the implementation cost and pros and cons of different bycatch mitigation measures and alternative fishing methods.
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