https://www.livescience.com/animals/land-mammals/wolf-stealing-underwater-crab-traps-caught-on-camera-for-the-first-time-signalling-new-dimension-in-their-behavior
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The wolf swam into deep water to retrieve a floating buoy attached to a submerged crab trap. It couldn't see the crab trap, but seemed to know the trap was there and how the human tool worked — once back on shore, the wolf began to reel in the line that led to the trap, scientists explained in a new research paper. Finally, when the trap emerged from the water, the wolf broke it open and devoured the bait inside.."
