Noise has a negative impact on marine life as it affects communication, orientation, feeding, reproductive behaviour and stress of marine organisms and can originate from various sources such as respiration, heartbeat or digestive system activities. Anthropogenic noise caused by ship traffic, underwater construction and industrial activities can also cause various injuries and trauma to marine animals. Marine mammals use sound for communication, navigation and hunting, but underwater noise impairs these abilities. Fish can respond to noise with behavioural changes, reduced feeding activity, interrupted migrations and increased vulnerability to predation. Sea turtles also suffer from the negative effects of noise, which makes it difficult for them to orientate themselves. Underwater noise affects not only aquatic organisms, but also birds that feed near aquatic habitats. The aim of this article is to describe how noise affects the hearing of marine organisms, what damage is caused by barotrauma and how they react to stress.