Overview

• Researchers observed Southern Resident orcas using kelp tools in 30 instances during aerial surveys near Washington State.
• The whales break and share segments of Nereocystis luetkeana stems to rub each other, a behavior now termed "Allokelping".
• This form of cooperative grooming spans all ages and sexes, suggesting a central role in the population’s social dynamics.
• Bull Kelp stipes are firm and flexible with smooth surfaces offering antibacterial and anti-inflammatory benefits that likely improve skin health.
• Scientists will assess whether Allokelping occurs in other orca populations as kelp forests decline due to rising sea temperatures.