Risso’s Dolphin Dies from Respiratory Failure in Pangasinan
CALASIAO — A Risso’s dolphin (Grampus griseus) stranded near a coastal village in Dasol, western Pangasinan, has died due to respiratory failure, according to a necropsy report released on June 29.
Veterinarian Hasmin Chogsayan and her team at Cariaz Island performed the necropsy on the adult male dolphin. It was first discovered wounded in the waters off Barangay Petal by fishermen late on June 27. Locals reported the dolphin had lost buoyancy and would sink if not supported by volunteers.
Rescue Efforts and Cause of Death
The dolphin was transported for medical care and rehabilitation to Cariaz Island but died shortly before noon en route to the Bureau of Fisheries and Aquatic Resources (BFAR) rehabilitation pen designated for stranded marine mammals.
While respiratory failure was identified as the immediate cause of death, Chogsayan noted that human activities might have contributed to the condition. “The dolphin could have become entangled in fishing nets or gear and was unable to free itself, or no one helped it until water entered its blowhole,” she explained during a phone interview.
Wounds Suggest Struggle in the Wild
The dolphin’s body bore multiple wounds, likely caused by rubbing against rough surfaces such as rocks, shells, or fish traps. These injuries suggest a prolonged struggle before it was found.
Following its death, the dolphin’s carcass was buried on Camantiles Island within the Hundred Islands National Park. This was done with approval from the Alaminos City government, which oversees the park.
Marine Mammal Protection and Ongoing Stranding Cases
Risso’s dolphins, like all marine mammals, are protected under the Marine Mammal Protection Act. Despite this, the BFAR documented 14 marine mammal strandings across Region I during the first half of 2025, highlighting ongoing threats to these species.
Local authorities emphasize the importance of community vigilance and responsible fishing practices to reduce human impact on marine life.
For more news and updates on marine mammal protection, visit Filipinokami.com.