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Orcas Stun Scientists by Using “Fishing Nets” to Catch Prey—A Human-Only Skill, NO!

Marine biologists are scrambling to explain footage showing orcas herding fish into tight “nets” of kelp, a sophisticated hunting strategy long believed to be unique to humans. The discovery comes from drone videos captured off the coast of British Columbia, where pods of killer whales were observed weaving through seaweed beds to trap schools of herring before striking.

@NOAAScience “Incredible new footage of orcas using kelp as a hunting tool challenges our understanding of animal ingenuity.” view on X

“We never imagined cetaceans could manipulate their environment so deftly,” says Dr. Marina Lopez of the University of Bristol’s Marine Mammal Lab. Her team’s recent paper in Marine Mammal Science documents repeated use of kelp barriers by at least three distinct orca families.

Typically, orcas employ teamwork—forcing fish toward the surface and stunning them with tail slaps. But in this region, pods have been seen funneling herring into dense kelp beds, effectively creating a net. “This behavior suggests tool use and planning,” notes Lopez, echoing observations published by Nature Ecology & Evolution.

@NatureEcolEvo “First documentation of orca tool use: kelp nets widen our view of animal intelligence.” view on X

Drone pilot and wildlife photographer Jacob Harris told BBC News that “one pod member would swim circles in the kelp bed, creating a barrier, while others corralled fish into the gap. It looked like a coordinated fishing net.” His video has racked up over 4 million views under the hashtag #OrcaNet.

@BBCNature “Pod of orcas uses kelp ‘nets’ to ensnare prey—behavior never before recorded in whales.” view on X

Tool use in mammals is rare; examples include chimpanzees’ nut-cracking and dolphins using sponges as protective snouts. Now, orcas join the list, expanding our view of cultural transmission in the wild. “Juveniles likely learn by imitation, pointing to social learning,” explains Dr. Hugo Martinez of Scripps Institution of Oceanography.

Marine anthropologist Dr. Lisa Chung, writing in Current Anthropology, argues that “when animals use environmental features as tools, it reshapes how we define technology in nature.” Her analysis suggests orcas’ kelp-netting may have emerged under intense competition for diminishing fish stocks.

@NatGeo “Orcas adapting to changing ecosystems by innovating new hunting methods—kelp nets may be key.” view on X

Environmental stresses may indeed spur innovation. A parallel project by the World Wildlife Fund shows herring populations off the Pacific coast have declined by 40% since 2015, pushing predators to adapt. “Behavioral flexibility is survival,” says WWF ecologist Priya Singh.

Not all experts agree on the interpretation. Some caution that using kelp beds may be an extension of existing herding tactics rather than true tool use. Dr. Einar Olsen of the Norwegian Polar Institute urges restraint: “We must distinguish between environmental exploitation and intentional fabrication of tools.”

@PolarInstitute “Further study needed to confirm whether kelp-netting meets criteria for tool use.” view on X

Field researchers are now planning controlled observations. Teams from the University of Victoria’s Marine Predator Lab will tag individuals and monitor family groups for transmission of the kelp-net behavior—hoping to capture its emergence and persistence.

Meanwhile, conservationists see new urgency. “Recognizing orcas’ complex culture strengthens the case for protected marine corridors and kelp forest conservation,” argues Dr. Martina Rossi of Ocean Conservancy. She warns that kelp bed destruction could erase critical habitats—and the tools orcas rely on.

@OceanCons “Preserving kelp ecosystems is vital for orca survival—and the tools they create.” view on X

Public fascination is high. A petition on Change.org calling for increased protection of kelp forests has garnered 120,000 signatures in two days. Social media buzz under #OrcaInnovation shows widespread support for measures to safeguard these intelligent whales and their environments.

As scientists continue to unravel orca ingenuity, one fact emerges: the oceans hold more surprises than we ever imagined. If whales can repurpose kelp into hunting nets, what other marvels of animal engineering await discovery beneath the waves?

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