They dolphin I put in a aqurium and my son put some in aquarium I put 6 in and 2 fell out the glass bottom other 4 just disappeared my son put a bunch in a tank that had a open hole in top in case it needed air and his disappeared also. Also have had puffer fish fall out of the bottom of the aquarium also and die.
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it happens when I leave the room and come back all i can really record would be the dead fish left in room from the puffer dieing. Im thinking it is like the issue with villagers where when they unload sometimes they reload on wrong side of fence I think they are reloading where the glass is or on outside.
Does MC-2025 describe your issue?

yea sorry didnt see that i searched dolphins and didnt see a bug on it. so its affecting fish also and also I can stand in my room for 20 to 30 mins and all dolphins will usually die by then. think they are suffercating in the blocks.
That is okay also add any information that is not in that issue. 🙂

i have the video where i put 6 dolphins in and left for 20 mins came back they were gone where i send it
Can you attach a video of this issue with the debug screen (press
F3
) enable?