My fish won't leave. Please help.

I placed an aquarium a while ago and decided to put fish in it. I decided to stash it and the fish, but the fish didn’t stash. Instead they just stayed where the aquarium was flopping. I’ve tried stashing them from different angles but it still doesn’t work.

Try using the item finder feature. While holding down Q, click on the item finder at the top right of the screen. From there you can search for the fish and stash them.