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| Sound produced | yes, active sound production |
| Type of sound produced | escape knocks, toothy clicks, thumps |
| Sound production organ | teeth & swimbladder |
| Sound mechanism | vibration, stridulation |
| Behavioural context | under duress |
| Reference | Fish, M.P. and W.H. Mowbray, 1970 |
| Remark | 2 specimens under mild duress (electrical stimulation) |