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|Sound produced||yes, active sound production|
|Type of sound produced||scrapes, thumps & knocks|
|Sound production organ||teeth & swim bladder|
|Sound mechanism||stridulation of teeth, probably amplified by swim bladder|
|Behavioural context||small scrapes when netted & handled, weak to loud thumps & scratchy knocks with electrical stimulation|
|Reference||Fish, M.P. and W.H. Mowbray, 1970|
|Remark||Genus characterized by expansion of second interhaemal to form a hollow cylinder into which the posterior end of the swim bladder fits. Recorded with bandpass filter: 75 -1200 Hz, recording amplified by 6 dB|