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| Sound produced | yes, active sound production |
| Type of sound produced | escape sounds, growls & thumps |
| Sound production organ | swim bladder |
| Sound mechanism | vibration by contraction of associated muscles, possibly reinforced by passage of gas over sharp traverse septa between lobes of swimbladder |
| Behavioural context | under duress (handling or electric stimulation) |
| Reference | Fish, M.P. and W.H. Mowbray, 1970 |
| Remark | no spontaneous sounds recorded, but known to occur during flight & threat display & spawning preliminaries (males) |