Aquatic communication refers to the ways in which animals living in water convey information to one another. This can include visual signals, such as color changes in fish, and auditory signals, like the sounds made by whales and dolphins. Many aquatic species also use chemical signals, releasing pheromones to communicate about mating or territory. Different species have adapted their communication methods to their environments. For instance, octopuses can change their skin color and texture to signal to others, while sharks may rely on body language and movement patterns. Understanding these communication methods helps researchers learn more about aquatic ecosystems.