Dear MARMAM Readers, Aquatic Mammals journal’s 5th issue (51.5) in 2025 is now available online. Direct link: https://www.aquaticmammalsjournal.org/product-category/issues/2025/vol-51-is... This is a special issue associated with the 8th International Meeting on the Effects of Sound in the Ocean on Marine Mammals (ESOMM) held last year (2024) in the Netherlands. The TOC is listed below and this issue includes articles as well as the symposium programme and abstracts (with index) from the meeting. All articles are open access thanks to sponsorship by EnerGeo (https://energeoalliance.org/). Happy Reading! Further information about the journal can be found at: http://www.aquaticmammalsjournal.org/ To submit a manuscript for publication consideration, please visit: http://am.expressacademic.org/actions/author.php With regards, Kathleen M. Dudzinski, Ph.D. Editor, Aquatic Mammals Journal business@aquaticmammalsjournal.org <mailto:business@aquaticmammalsjournal.org> Issue 51.5 contents (All are open access.): Frans-Peter A. Lam, Marije L. Siemensma, Alexandria Loureiro, and Dagmar Fertl. (2025). ESOMM-2024 Special Issue: 8th International Meeting on the Effects of Sound in the Ocean on Marine Mammals. Aquatic Mammals, 51(5), i-ii. Ronald A. Kastelein, Nancy Jennings, and John M. Terhune. (2025). Similar Hearing Thresholds at 8 kHz, but Dissimilar Susceptibility of Hearing to Damage by 8 kHz Sounds in a Harbor Porpoise, a Harbor Seal, and a California Sea Lion. Aquatic Mammals, 51(5), 1-7. Charlotte Curé, Saana Isojunno, Paul J. Wensveen, Marije L. Siemensma, Alexander M. von Benda-Beckmann, Petter H. Kvadsheim, Alec Burslem, Benjamin Benti, Rune Roland, Frans-Peter A. Lam, and Patrick J. O. Miller. (2025). Severity Scoring of Sperm Whale Behavioral Responses to an Operational Sonar Source Reveals Importance of Received Level and Source-Receiver Distance. Aquatic Mammals, 51(5), 8-27. John M. Terhune and Ronald A. Kastelein. (2025). Critical Ratio Measurements Can be Used to Assess Effective Quiet Thresholds in Harbor Seals, Harbor Porpoises, and California Sea Lions. Aquatic Mammals, 51(5), 28-37. Filipa I. P. Samarra, Paul J. Wensveen, Anna Selbmann, Petter H. Kvadsheim, Frans-Peter A. Lam, Peter L. Tyack, Alexander M. von Benda-Beckmann, and Patrick J. O. Miller. (2025). Killer Whale (Orcinus orca) Acoustic Responses to Naval Sonar. Aquatic Mammals, 51(5), 38-55. Frans-Peter A. Lam. (2025). ESOMM-2024 Programme: 8th International Meeting on the Effects of Sound in the Ocean on Marine Mammals. Aquatic Mammals, 51(5), 57-97. Kathleen M. Dudzinski, Ph.D. Editor, Aquatic Mammals business@aquaticmammalsjournal.org <mailto:business@aquaticmammalsjournal.org> www.aquaticmammalsjournal.org <http://www.aquaticmammalsjournal.org/>