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| Sound produced | yes, active sound production |
| Type of sound produced | clicks |
| Sound production organ | bony edges of skull and coronet, possibly swimbladder with internal perforated septum (amplification and sustained clicking) |
| Sound mechanism | stridulatory snapping of edges against each other through sharp upward movement of head and rapid movement of mouth parts, amplification of snaps by swimbladder |
| Behavioural context | feeding & mating (both sexes) & introduction into new surroundings (possibly orientation) |
| Reference | Fish, M.P. and W.H. Mowbray, 1970 |
| Remark | almost continous high-frequency clicking during mating embrace |