Clever stingray fish use tools to solve problems

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That study was done a long time ago... did someone else just try and take credit for this.... im not sure who did it first but it was def a long time ago
 
lol maybe it was a study i found today that was done a while back.. thats possible too. I think its pretty cool. I watch a ceja suck fish in under its disk by using the vacuum method.
 
wonder if he thinks those rays are castexi... look like retics to me lol some scientist
 
Love it....
 
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