Chessrook44 [2013-07-02 23:12:54 +0000 UTC]
I imagine it's formed by some weird combination of her gills, throat, mouth, tongue, and whatever keeps her from suffocating. Or perhaps done in a way that allows her to speak and be understood more clearly underwater to the ears of others like her. Humans probably sound very faint to her... and not just because of the sound.
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