Noise pollution
Noise pollution may have caused the death of certain species of whales that beached themselves after being exposed to the loud sound of military sonar. (see also Marine mammals and sonar) Even marine invertebrates, such as crabs ("Carcinus maenas"), have been shown to be negatively affected by ship noise. Larger crabs were noted to be negatively affected more by the sounds than smaller crabs. Repeated exposure to the sounds did lead to acclimatization.