Discussion
Many bivalves and other mollusks have a planktonic veliger stage, when they possess a wing-like organ called a velum, which I like to imagine making little helicopter noises. The velum is covered by cilia which beat from a few to hundreds of times per second, channeling food towards them and helping them swim around in the water column! #clamFacts https://youtu.be/J3urhZ8LJkA?is=R73I_RXQNqwdbqlW
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@dantheclamman Hmm why imagine - can you record their movement? - if it's as high as a few hundred you should be able to make it audible easily.
@penguin42 I know of people recording the sound of clams opening and closing, or tearing byssal threads like the string of a harp, I can't find anyone recording this!
@dantheclamman There's got to be a paper in that 😄 I'm not sure what the best way to do it would be, but I guess if you're saying they go upto a few hundred Hz, then maybe a high-speed camera at say a couple of thousand frames/second ?
@penguin42 oh people do film it! That is very common method to quantity the beating. I just don't know if people record the vibration of the water (the "sound") at that scale!
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@dantheclamman You said "little helicopter noises" so of course my brain heard the "Airwolf" opening when I played the video.