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catfish rattlingn noise

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slipperybob:
For the first time I paid attention to the catfish rattle.  I always thought that they were burping the rattle..  However I saw the catfish used its pectoral fins.  It rattled as the catfish rattled it.  Thats amazing.

panfishman13:
it is pretty cool! they actually make the noise similarly to the way crickets chirp, by rubbing two ribbed bones together.

slipperybob:
I wonder the reason behind their rattle is.  Do they do it to be aggressive, like a hissing cat or growling dog?

Or like a rattling rattler?  They gonna strike with that barbed fin of theirs.  I know at least the little catfish, some will purposely try to sting you, when you release them.

panfishman13:
fish don't deal with sound very often, and catfish deal with stuff above water even less. most likely it's a distress signal meant to send a very recognizable vibration pattern through the water. basically just saying "warning, i'm in danger, there's a predator here"

slipperybob:
These aren't little catfish.  Decent in size.  22"-28" in length.  Now I've heard even the big ones in the 30"-34" length ones would rattle as well.  I just never paid attention to it.  I'm thinking croaking is probably a better description of what they're doing. 

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