Researchers in Queensland have documented a remarkable example of dolphin ingenuity: bottlenose dolphins using empty seashells to help catch fish. The behavior, known as shelling, was observed in Hervey Bay by scientists from the University of the Sunshine Coast.
In the technique, a dolphin chases fish into a large, hollow shell resting on the seafloor, then lifts and manipulates the shell near the surface until the prey escapes. The shell effectively becomes a temporary trap, turning a simple object into a fishing aid.
Rare Behavior, Shared Across Regions
What makes the finding especially striking is that shelling had previously been recorded mainly in Shark Bay on Australia's west coast. Seeing the same behavior in eastern Australia suggests that distant dolphin groups may have arrived at the same solution independently rather than learning it from one another.
One observation in July 2025 captured an adult female dolphin carrying a shell while foraging alone. A later sighting showed a mother dolphin passing the behavior to her calf, offering a clear glimpse into how young dolphins may learn specialized feeding skills through close social contact.
The study adds to growing evidence that dolphins are not only intelligent, but also capable of passing knowledge through social learning. It also highlights how different populations can develop similar tools and strategies in separate environments. In the future, such discoveries may deepen our understanding of animal culture and the evolution of problem-solving in the natural world.
