Dear MARMAM Subscribers, The 4th issue of volume 50 (50.4) of Aquatic Mammals journal is available online and officially published. 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> Articles with ** are open access: Heidi L. Bonifácio, Vera M. F. da Silva, Anthony R. Martin, Patrik F. Viana, and Eliana Feldberg. (2024). The Karyotype of Tucuxi (Sotalia fluviatilis; Cetartiodactyla, Delphinidae). Aquatic Mammals,50(4), 275-283. Dalia C. Barragán-Barrera, Casandra Gálvez, Christian Bermúdez-Rivas, María del Pilar Aguirre-Tapiero, Isabel C. Avila, Katerin Arévalo-González, and Tatiana A. Acosta-Pachón. (2024). Systematic Review of Pinniped Sightings and Strandings Along the Pacific Coast of Colombia: Implications for Pinniped Conservation. Aquatic Mammals, 50(4), 284-301. **Lemnuel V. Aragones, Alessandra Nicole L. Morado, Marie Christine M. Obusan, Honey Leen M. Laggui, Jonah L. Bondoc, Leo Jonathan A. Suarez, and Ewen Kye Lawler. (2024). Spatiotemporal Variation of Stranded Marine Mammals in the Philippines from 2005 to 2022: Latest Stranding Hotspots and Species Stranding Status. Aquatic Mammals, 50(4), 302-322. Raúl E. Díaz-Gamboa, Pamela García-Aguilar, Alberto Pereira-Corona, and Carlos A. Niño-Torres. (2024). Determination of Metal and Metalloids in Bottlenose Dolphins’ (Tursiops truncatus) Skin from the Yucatan Peninsula, Mexico. Aquatic Mammals, 50(4), 323-331. Elke Schüttler, Melisa Gañan, Omar Barroso, Tamara Contador, Diego Illanes, Gabriel Muñoz-Araya, María-José Palma, María-José Pérez-Álvarez, Maritza Sepúlveda, and Javier Rendoll-Cárcamo. (2024). Observations of Attacks on Sei and Fin Whales by Killer Whales in Magellanic Sub-Antarctic Waters, Chile. Aquatic Mammals, 50(4), 332-341. **Hana A. Koilpillai, Charla J. Basran, Simon Berrow, Fredrik Broms, Valerie Chosson, Shannon Gowans, Lindsey S. Jones, Reg Kempen, Pedro López-Suárez, Edda Magnúsdóttir, Nick Massett, Kris Prince, Marianne H. Rasmussen, Jooke Robbins, Richard Sears, Peter Simard, Malene Simon, Pádraig Whooley, and Frederick W. Wenzel. (2024). Geographic Distribution of North Atlantic Humpback Whales (Megaptera novaeangliae) with Fluke Scars Caused by Killer Whales (Orcinus orca). Aquatic Mammals, 50(4), 342-351. **Lars Kleivane, Petter H. Kvadsheim, Anna Victoria Pyne Vinje, Jason Mulsow, Rolf Arne Ølberg, Jonas Teilmann, Craig Harms, and Dorian Houser. (2024). Capture and Release of Minke Whales Offers New Research Opportunities, Including Measurements of Mysticete Hearing. Aquatic Mammals, 50(4), 352-368. **Kathleen Dezio. (2024). First-Ever West Coast AMMPA Annual Meeting Held May 7-9 in San Diego.Aquatic Mammals, 50(4), 369-371.