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Trout - please explain

Mtn Hunter

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Jan 2, 2012
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My dad was cleaning a trout the other day and found these small rocks in it's stomach. Can someone explain to me why this trout would have swallowed these rocks? We've never seen this before.
 

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Very interesting.
Total guess but I would say it got them while snatching something else off the bottom.

How big was the trout?
Rainbow, brown or what?
 
Did a quick search and this is actually kinda common apparently.
General consensus is they get them while eating other things.
 
Flip a few rocks over in a trout stream and you'll find the nymphs or larva they're eating. In the process I'm sure ingesting a few pebbles is common.
 

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