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Old 05-20-2009, 12:28 AM
Colibri Colibri is offline
SD Curator of Critters
Join Date: Oct 2000
Location: Panama
Posts: 38,142
Originally Posted by mlees View Post
Would this be considered "vocalisation"? (I don't know if intent to communicate is what defines vocalisation.)
For land vertebrates, "vocalization" generally implies a sound made with the voice, that is, by expelling air through the mouth, rather than mechanical sounds made by other body parts (e.g. beaver tail slapping, gorilla chest thumping, wing whirring by birds). I suppose one could extend that to sounds made by fish using vibrations of the swim bladder, even though no air is expelled.

As has been mentioned, many bony fish make sounds, and some are even named for the sounds they make (grunts, croakers). Since sharks lack swim bladders, any sounds would most likely be limited to mechanical ones.