**Sophie Brasseur, Jeroen Hoekendijk, Judith D. L. van Bleijswijk, and Lise Klunder. (2025). Prey Selection by Walrus (Odobenus rosmarus rosmarus) in the Dutch Wadden Sea, the Netherlands. Aquatic Mammals, 51(2), 105-112.
Miguel A. Iñíguez-Bessega, Marta Hevia, Frank Cipriano, Jimena M. I. Belgrano, Mauricio Failla, Antonio Fernández, Cecilia Gasparrou, Anton L. van Helden, Juan Jones, Nicolás Manterola, M. Vanesa Reyes Reyes, Vanesa P. Tossenberger, Matías Ventura, Ian Walker, and Eliana Zuazquita. (2025). Stranding of Beaked Whales in Santa Cruz Province, Southern Patagonia, Argentina (1895-2023). Aquatic Mammals, 51(2), 113-130.
**Amy Y. Olsen, Angela Smith, Kelli Lee, Carol Jackson, Sheriden Ploof, and Shawn Larson. (2025). Preliminary Results of Harbor Seal (Phoca vitulina) Salivary Progesterone During Breeding Under Human Care. Aquatic Mammals, 51(2), 131-137.
Sabre D. Mahaffy, Uko Gorter, and Robin W. Baird. (2025). Neonatal Facial Pigmentation of Pygmy Killer Whales (Feresa attenuata): A Description from Repeated Observations of Individuals in the Wild. Aquatic Mammals, 51(2), 138-143.
M. Fernanda Urrutia-Osorio, Thomas A. Jefferson, Phillip A. Morin, Brittany L. Hancock-Hanser, Michael McGowen, Madeleine A. Becker, and Frederick I. Archer. (2025). Phylogenetic Relationships Among Eastern Pacific Common Dolphins (Delphinus spp.). Aquatic Mammals, 51(2), 144-153.
Juan Pablo Gallo-Reynoso, Ana-Luisa Figueroa-Carranza, and Adriana Estefanía Flores-Morán. (2025). Allonursing in Guadalupe Fur Seals (Arctocephalus philippii townsendi) as a Response to Pup Mortality Caused by a Tropical Depression. Aquatic Mammals, 51(2), 154-162.
**Barry McGovern, Abigail F. Machernis, Jessica A. McCordic, Grace L. Olson, Florence A. Sullivan, Shannon M. Barber-Meyer, Jens J. Currie, and Stephanie H. Stack. (2025). Prevalence, Composition, and Behaviour of Humpback Whale (Megaptera novaeangliae) Groups Containing Multiple Mother–Calf Pairs in East Australia. Aquatic Mammals, 51(2), 163-177.
**Girlan Dias, Adriano Gambarini, Marcelo Oliveira-da-Costa, and Miriam Marmontel. (2025). An Unusual Record of a Marine Dolphin (Sotalia guianensis) Being Scavenged by Jaguar (Panthera onca) at the Northern Brazilian Amazon. Aquatic Mammals, 51(2), 178-184.
Alexsandro A. P. Damasceno, Gabriel Melo-Santos, Angélica L. F. Rodrigues, Sávia Moreira, Uiara H. A. Barreto, Stephane F. Silva, Flávia C. M. Oliveira, Suelen J. C. Lima, Flávia S. Tavares, Gessiane P. Silva, Denny P. S. B. M. Leite, Pollyanne R. F. Oliveira, Camila R. B. Lima, Thais F. C. Fraga-Silva, Pedro N. Jorge-Neto, Rodrigo P. Rangel, Rodrigo H. Tardin, Guilherme Maricato, Verónica Avalos, Maria Alice S. Alves, Alex Klautau, José W. Pinheiro Júnior, Wagnner J. N. Porto, Rinaldo A. Mota, Abelardo Silva-Júnior, and Frederico O. B. Monteiro. (2025). Capture-Release Protocol for Araguaian River Dolphins (Inia araguaiaensis) and Preliminary Physiological Parameters: An In Situ Approach for Research and Conservation. Aquatic Mammals, 51(2), 185-192.
In Memoriam
**Renata S. Sousa-Lima, Laura J. May-Collado, Beth Brady, and Nataly Castelblanco-Martínez. (2025). In Memoriam: “Force of Nature” – Eric Angel Ramos. Aquatic Mammals, 51(2), 193-195.
Erratum
**Rita Ferreira, Filipe Alves, Claudia Gomes, Daniel Jardim, Judith Kok, and Ana Dinis. (2025). Erratum: Species Identification Update for First Confirmed Record of Northern Bottlenose Whale (Hyperoodon ampullatus) in Madeira Archipelago, Northeast Atlantic. Aquatic Mammals, 51(2), 196.