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These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. Instead, they generally hear sounds through special structures in their jawbones. Their ear canals are not open to the outside. Whales and dolphins do have ears but they don’t have external sticky out ears like ours to funnel sound as they need to be streamlined for life in the water. Though only very brief, the clicks they make are the loudest sound in the animal kingdom. Sperm whales also use echolocation to find their way around the dark depths of the ocean and to help with hunting for squid. Not only that but they can even use it to identify any prey that might be hiding, such as under the sand! Dolphins hunt using their highly-developed echolocation, which means they can find food no matter how murky the water might be. This means that they emit sound waves and then detect and interpret the echoes that bounce back off of other creatures and objects in the water around them, allowing them to build up a picture of their surroundings. In general, as well as having extremely good eyesight that allows them to see both above and below the water, toothed whales (including dolphins) use a sense called echolocation to navigate and hunt underwater.
It is also thought that each dolphin has a unique whistle called a ‘signature whistle’, which is used to identify an individual. Clicks are used to sense their surroundings through echolocation, while they use whistles to communicate with other members of their species and very likely, with other species too. In general, dolphins make two kinds of sounds, “whistles” and “clicks” (listen to the false killer whales on this page). Dolphins and porpoises however, usually use higher frequencies, which limits the distance their sounds can travel. Large whales can communicate over huge distances (across entire ocean basins) using very low frequencies.
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