Champ on Sonar?

I can't say yes or no to this one. I have seen unusual things on scans due to various things, causing anomalies to show up. I have seen schools of fish looking similar to that and that supposed fin could've have been feeding fish disrupting the group. I guess until photographic or forensic proof is laid out, we can only speculate and dream of these things. Would be nice if in my or all of our lifetimes something concrete is presented.
 
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It sure looks like a big creature. I wonder if this thing crawls out onto land and that’s why it is elusive. It reminded me of a big alligator
 
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