I was flying in a creative world above oceans and heard loud swimming noises 2 times. Both times, I tracked it down to a no AI salmon facing North. Hitting it did not move it and the noises stopped when I killed it. It happened near kelp both times, and I was in the cold ocean biome the second time (Did not check the first time).
Thank you for your report!
We're actually already tracking this issue in MC-175538, so I resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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