Dear MARMAM Subscribers, The first issue of volume 51 (51.1) of Aquatic Mammals journal is available online and officially published Wednesday, January 15th. 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: Lucía Yaffé, Damián G. Vales, Enrique A. Crespo, and Valentina Franco-Trecu. (2025). Feeding Habits and Individual Specialization in Adult Female South American Sea Lions (Otaria flavescens) in Patagonia. Aquatic Mammals, 51(1), 1-12. **Ronald A. Kastelein, Lean Helder-Hoek, Laura Van Acoleyen, Linde N. Defillet, John M. Terhune, and Nancy Jennings. (2025). Temporary Hearing Threshold Shift in California Sea Lions (Zalophus californianus) Due to a Noise Band Centered at 40 kHz and Comparison with Shifts Due to Lower-Frequency Sounds. Aquatic Mammals, 51(1), 13-30. **Gabriela M. Ochoa, Eric Angel Ramos, and Daniel Gonzalez-Socoloske. (2025). Predation of a Sperm Whale (Physeter macrocephalus) by Killer Whales (Orcinus orca) in Guanaja, Honduras. Aquatic Mammals, 51(1), 31-36. **Gonçalo N. Marques, Rita Barny, Joana S. Guerra, Miriam Leal, Nuno Urbani, and Carla Flanagan. (2025). A Suggested In-House Respiratory Fungal Culture Protocol for Bottlenose Dolphins (Tursiops truncatus). Aquatic Mammals, 51(1),37-45. Karen Ankersen Sønnichsen, Niels Madsen, Sussie Pagh, Aage Kristian Olsen Alstrup, Charlotte Bie Thøstesen, Line Anker Kyhn, and Trine Hammer Jensen. (2025). Causes of Mortality in Harbor (Phoca vitulina) and Gray (Halichoerus grypus) Seals in Denmark. Aquatic Mammals, 51(1), 46-61. **Sean Todd, Jooke Robbins, Mason T. Weinrich, Natasha Pastor, Dan Dendanto, Per J. Palsbøll, and Ann M. Zoidis. (2025). Examination of Isotopic Signals to Determine Trophic Dynamics and Diet of Gulf of Maine Mysticetes Prior to an Oceanographic Regime Shift. Aquatic Mammals, 51(1), 62-78. **Ronald A. Kastelein, Lean Helder-Hoek, Laura Van Acoleyen, and John M. Terhune. (2025). Temporary Hearing Threshold Shift and Testing the Equal-Energy Hypothesis in Harbor Seals (Phoca vitulina) After Exposure to a One-Sixth-Octave Noise Band Centered at 8 kHz. Aquatic Mammals, 51(1), 79-95. Ambrosine L. Clark, Francesca Fusar Poli, and Vidal Martín. (2025). Whistle Characteristics of the Rough-Toothed Dolphin (Steno bredanensis) in the Canary Islands. Aquatic Mammals, 51(1), 96-104.