A spectrogram (visual representation of a sound) of stereotyped 20 Hz fin whale calls

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A spectrogram (visual representation of a sound) of stereotyped 20 Hz fin whale calls

© NOAA Fisheries

A spectrogram (visual representation of a sound) of stereotyped 20 Hz fin whale calls photo copyright NOAA Fisheries taken at and featuring the Cruising Yacht class

Cruising Yacht

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