A 700-pound California sea lion was found dead on a beach off the Duwamish River in West Seattle, Washington, on Sept. 18, 2026, after suffering at least a dozen gunshot wounds, according to officials.
Discovery and Field Examination in West Seattle
The dead marine mammal was reported near the Harbor Island area in West Seattle on Sept. 18, 2026, according to Seal Sitters, a group of trained professionals and volunteers who respond to sick, injured, entangled or dead marine mammals. Following the report, researchers from SR3—a marine animal rescue, rehabilitation, and research organization—responded to the beach to conduct an initial investigation.
Casey McLean, executive director and veterinary nurse for SR3, stated that field X-rays revealed the sea lion had sustained at least 12 gunshot wounds. Due to the limitations of field X-ray equipment covering a 700-pound animal, researchers could not determine the exact final count of projectiles embedded in the body. McLean noted that this was probably the most amount of projectiles she had seen on one body in her career.
Logistical Challenges and Cause of Death
Responders opted against performing a full necropsy on the healthy adult sea lion. McLean explained that moving a marine mammal of that size is rather difficult, and disposal is quite expensive. Despite the lack of a full autopsy, researchers concluded that the severity and volume of the injuries meant the animal could not have survived long after the shooting, likely expiring quickly either on land or while floating in the water.
The exact location of the shooting and the identity of the shooter remain unknown. Authorities have not established a motive for the attack, which occurred in an area near the mouth of the Duwamish River.
Federal Protections Under the Marine Mammal Protection Act
California sea lions are federally protected under the Marine Mammal Protection Act (MMPA). Violating the act carries legal consequences, including up to a year in prison alongside criminal fines and civil penalties.
McLean pointed to misguided information regarding the impacts these animals have on fisheries as a driving factor behind aggression toward the animals. She emphasized that shooting protected wildlife fails to solve fishery concerns and is not humane to the animals.
Pro Tip: If you spot a dead, injured, or entangled marine mammal in the Pacific Northwest, do not approach the animal. Report the incident immediately to local response organizations like Seal Sitters or SR3 to assist with professional documentation and enforcement.
Recent Enforcement Actions Involving Protected Sea Lions
Federal wildlife laws are actively enforced against public harassment and violence directed at marine mammals. In a separate case reported by The Associated Press, a San Diego man pleaded guilty to a federal charge after video captured him kicking and chasing a protected sea lion at a local beach. That defendant faces a sentencing hearing on Oct. 20, where he faces up to a year in prison and a $100,000 fine.
Did You Know? SR3 utilizes specialized field X-ray technology directly on beaches to assess trauma in large marine mammals like sea lions and seals without needing to transport heavy carcasses to a laboratory.
Frequently Asked Questions
What protections do California sea lions have?
California sea lions are protected under the federal Marine Mammal Protection Act. Violations can result in criminal penalties, civil fines, and up to a year in prison.
Who investigated the West Seattle sea lion incident?
The incident was initially reported to Seal Sitters, with response and investigation handled by researchers from SR3, a marine mammal rescue and rehabilitation organization.
Are the suspects in the West Seattle shooting identified?
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