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|Sound produced||yes, active sound production|
|Type of sound produced||knocks, thumps (& croaks)|
|Sound production organ||unspecified but probably swim bladder with drumming muscles in males only & pharyngeal teeth in close proximity to swim bladder in both sexes|
|Sound mechanism||unspecified, but probably similar to Cynoscion regalis: males only: vibration of swim bladder by contraction of associated "drumming" muscles, high-pitched clucking in both sexes produced by stridulation of pharyngeal teeth amplified by swim bladder|
|Behavioural context||under duress (manual & electric stimulation)|
|Reference||Fish, M.P. and W.H. Mowbray, 1970|
|Remark||no sex data available, but lack of croaking in recording suggests female specimen only, since drumming muscles are limited to males in morphologically related sciaenids.Recorded with highpass filter: 60 Hz. Recording amplifed by 6 dB|