2025, December 16. Argentina, at San Clemente del Tuyú. A beaked whale (Ziphiidae) stranded on the beach. Rescuers tried to refloat the animal however it was found lifeless the next morning. Preliminary necropsy results revealed pneumonia and a high gastrointestinal parasite load, likely causing its death. The stranded whale was a juvenile male, 4.32 meters long and weighing about one ton. Rescue was complicated by low visibility and the whale’s repeated circular swimming pattern, typical of cetaceans in poor health.
2025, December 17. Taiwan, Xiaoliuqiu. Shanfufu Fishing Harbor. Beaked whale, about 4 meters long at a depth of 12 meters underwater. The cause of death is currently unknown, but fishing gear entanglement is likely the cause.
Update: 20251223. 2025, December 21. UK, Cornwall, Mount's Bay region, Marazion. Cuvier's beaked whale washed ashore in advanced state of decomposition. Muscle and skin samples were taken for genetic testing two teeth to go for Isotope examination.
2025, December 23. Indian Ocean, midway between Mauritius and Port Mathurin. Two Blainville's beaked whales (Mesoplodon densirostris) were reported dead on the 19th. Both were found dead at sea and imaged at the side of a fishing trawler. They were not caught in trailing gear, and COD is unknown. No injuries were observed externally. It came after a large 6m long Layard's beaked whale was observed the day before with the same observation outcome. Over two dozen beaked whales observed dead in 2025 so far in southern Indian Ocean.
2025, December 5. Japan, Hokkaido, Shihidaka. A 537.8cm female Hubbs’ beaked whale (Mesoplodon carlhubbsi). Photo: ©Muroran Department of Public Works Management Mombetsu Branch.
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