Huffington Post, April 2014
Recently, scientists discovered Indo-Pacific bottlenose dolphins in Shark Bay off the coast of Australia apparently use tools in the wild. Specifically, the most common foraging tactic dolphins practice in deep-water channels involves carrying sponges on their snouts
https://www.huffpost.com/entry/dolphins-sponges-tools_n_5206207
https://www.huffpost.com/entry/dolphins-sponges-tools_n_5206207