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(A) Representative waveforms of different toadfish vocalizations. Horizontal scale bars represent 250 ms; amplitude of the different calls is not to scale. (B) Relative temporal position of the occurrence of the maximum amplitude in toadfish harmonic calls, for B. trispinosus (BT), Halobatrachus didactylus (HD), Opsanus beta (OB), O. phobetron (OP), O. tau (OT), and the growl and hum of Porichthys notatus (PN).
