Many marine animals (including mammals, fish and invertebrates) make underwater sounds. The sounds that these animals make depend on their physiology. For example, dolphins are able to make clicking sounds using mechanisms in their foreheads while some fishes can make squeaking sounds by rubbing body parts together. Many marine animals produce sounds in order to communicate with other organisms whether it be to find a mate or as protection against predators. Sounds are also produced during feeding and to help navigate underwater.

In a world where vision may be limited, many marine animals, such as these common dolphins, produce sounds to accomplish many tasks. Photograph ©Tom Kieckhefer.

For more information on how specific marine animals produce sounds use the following links:
Marine Mammals	Fish	Invertebrates