Fish sounds refer to the various noises produced by different species of fish, often used for communication, navigation, or attracting mates. These sounds can include grunts, clicks, and hums, which are generated through movements of their bodies, fins, or specialized structures like the swim bladder. Research has shown that fish sounds play a crucial role in their social interactions and can vary significantly between species. For example, clownfish use sounds to communicate with their partners, while cod produce low-frequency sounds during spawning. Understanding these sounds helps scientists learn more about fish behavior and ecology.