In the crystal-clear waters of Shark Bay, Western Australia, a small group of bottlenose dolphins has stunned scientists with their clever hunting technique—wearing sea sponges on their snouts like protective gloves. These intelligent marine mammals dive to the seabed and use the sponges to push aside rocks and stir up the sand in search of hidden fish like the barred sandperch. The sponge acts as a cushion, shielding their sensitive snouts from sharp shells, coral, and even the venomous spines of buried creatures. What’s even more fascinating? This technique, known as “sponging,” is not instinctual—it’s learned and passed down from mother to calf, making it one of the few known examples of animal culture in the wild.
But this smart strategy isn’t without its challenges. A recent study published in Royal Society Open Science found that while the sponge protects the dolphins physically, it distorts their echolocation, the sonar-like clicks they use to “see” underwater. This means the sponge muffles important echoes that help them detect prey. Still, the dolphins seem to adapt over time, showing patience, persistence, and learning. Only about 5% of the dolphin population in the area—mostly females—practice this behavior, and their ability to innovate and pass down knowledge highlights just how much we still have to learn about the intelligence and social lives of animals in the ocean. It’s a gentle yet powerful reminder: tool use isn’t just a human story—it’s a dolphin one too. More