Not a Fish, but a Zhark
We found Oleksii Zharko checking an flop to Frank Kasbergen, who bet. Zharko now check-raised, Kasbergen called, and they were faced with a turn.
The turn was the and Zharko checked again. The bet from Kasbergen was 5,200, and after a long period of private deliberation, Zharko called.
The river was the and this time Zharko bet out, to the tune of 7,500. Now it was Kasbergen's turn to dwell up. After some time, he called for around half his remaining stack, and then swiftly mucked when Zharko turned over for a rivered flush to an impressed, "Wow," from another player at the table.
The fortunate Zharko picked up the hefty pot to put him on an extremely healthy 55,000. Kasbergen was crippled to 7,000.