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|Sound produced||yes, active sound production|
|Type of sound produced||thumps, rumbles|
|Sound production organ||swim bladder|
|Sound mechanism||vibration by general body contraction|
|Behavioural context||under duress (electric stimulation)|
|Reference||Fish, M.P. and W.H. Mowbray, 1970|
|Remark||recorded with bandpass filter: 40 - 1200 Hz|