Dolphins are considered one of the world's most intelligent animals, and they have several cognitive abilities that set them apart. Many researchers consider intelligence to be a combination of perception, communication, and problem-solving. You can see dolphin intelligence in action in the way they communicate and use tools. Despite lacking hands, dolphins are adept at using tools. For instance, one of their more specialized tricks is to carry a sponge at the end of their beak, also know as a rostrum. This acts like padding, protecting them from sharp rocks as they dig through the seafloor for food. More fun facts: Dolphins are warm-blooded mammals; breathe through lungs, not gills; give birth to live young; produce milk for their young; and have body hair (doesn’t look like it, but they do!).
