For these dolphins, using sponges to dig up fish is a family tradition

 

Meredith MacQueeney / Shark Bay Dolphin Research Project / The Associated Press

In Shark Bay, Australia, a small group of bottlenose dolphins practice “sponging,” a rare tool-use tradition where they wear sea sponges on their noses to uncover hidden fish. First observed in 1984, the behavior is passed matrilineally from mothers to calves, with only about 30 dolphins (5% of the population) engaging in it. Though effective, sponging is time-consuming, difficult to master, and distorts echolocation, making it a skill requiring years of practice. Despite these challenges, successful spongers gain steady access to non-migratory, nutrient-rich fish with little competition, highlighting the unique cultural and ecological adaptations of dolphins in pristine Shark Bay

Read more: For these dolphins, using sponges to dig up fish is a family tradition | CBC Radio