Dear MARMAM Subscribers, Happy Summer! The 5th issue of volume 49 (49.5) of Aquatic Mammals journal is available online and will be officially published on Friday (15 September). 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: Chiaki Yamato, Kotaro Ichikawa, Kongkiat Kittiwattanawong, and Nobuaki Arai. (2023). First Record of Conspecific Aggression in Dugongs (Dugong dugon) in Thailand. Aquatic Mammals, 49(5), 411-421. **Ronald A. Kastelein, Lean Helder-Hoek, Laura Van Acoleyen, Linde N. Defillet, Léonie A. E. Huijser, and John M. Terhune. (2023). Underwater Sound Detection Thresholds (0.031-80 kHz) of Two California Sea Lions (Zalophus californianus) and a Revised Generic Audiogram for the Species. Aquatic Mammals, 49(5), 422-435. Jennifer E. Flower, Ane Uriarte, Barbara J. Mangold, Melissa Joblon, Anne Gilewski, James E. Bailey, James Hammond, Neha Mishra, S. Emi Knafo, Whitney Phipps, and Allison D. Tuttle. (2023). Ventriculoperitoneal Shunt Placement for Management of Non-Obstructive Hydrocephalus in a Northern Fur Seal (Callorhinus ursinus). Aquatic Mammals, 49(5), 436-442. **Lesly J. Cabrias-Contreras, Dalila Caicedo-Herrera, Ruby A. Montoya-Ospina, Sandra Millán-Tripp, Yenyfer Moná-Sanabria, Isabel V. Gómez-Camelo, Laura Jaramillo-Ortíz, Ana M. Aguirre-González, Bert Rivera-Marchand, and Antonio A. Mignucci-Giannoni. (2023). Hematology and Blood Chemistry Reference Intervals for Antillean Manatees (Trichechus manatus manatus) in Colombia. Aquatic Mammals, 49(5), 443-461. Sergey V. Fomin, Ivan D. Fedutin, Ekaterina A. Borisova, Ilya G. Meschersky, and Olga A. Filatova. (2023). Sea Otters (Enhydra lutris) Found in the Stomach of a Stranded Killer Whale (Orcinus orca) in the Commander Islands, Western North Pacific. Aquatic Mammals, 49(5), 462-467. Fernando Vilchez-Delgado, Susana Cárdenas-Alayza, Selene Diaz, Sandra Márquez-Alvis, Fátima Gúzman, Alejandro Pereda-Sanchez, Evelin García-Collave, Shaleyla Kelez, Yuri Hooker, and Carlos Calvo-Mac. (2023). South American Fur Seals (Arctocephalus australis) Out of Range in Northern Peru. Aquatic Mammals, 49(5), 468-474. Jong-U Kim, Younggeun Oh, Youmin Kim, and Jeong-Hoon Kim. (2023). Rare Observation of a Living Southern Elephant Seal (Mirounga leonina) at Terra Nova Bay, Victoria Land Coast, Ross Sea, Antarctica. Aquatic Mammals, 49(5), 475-479. Carl C. Kinze and Thomas A. Jefferson. (2023). Further Notes on the Early Nomenclature of Small Cetaceans. Aquatic Mammals, 49(5), 480-490. **Iain Kerr, Alicia Pensarosa, and Andy Rogan. (2023). Dr. Roger Payne: A Tribute. Aquatic Mammals, 49(5), 491. ** Kathleen M. Dudzinski (2023). Letter from the Managing Editor. Aquatic Mammals, 49(5), 492-493