Potential for sound sensitivity in cephalopods
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Hearing is a primary sense in many marine animals, and we now have a reasonable understanding of what stimuli generate clear responses, the frequency range of sensitivity, expected threshold values, and mechanisms of sound detection for several species of marine mammals and fishes (Au et al. 2000; Fay 1988). For marine invertebrates, our knowledge of hearing capabilities is relatively poor and a definition or even certainty of sound detection is not agreed on (Webster et al. 1992) despite their magnitude of biomass and often central role in ocean ecosystems.