I know that in bfbb, the fish in the sea needle move randomly, and sometimes fall, I want to know if it's possible in bfbbr

In OG BfBB you manipulate the fish AI by pressing the L button. I don't believe that it's possible to make them fall out of the sea needle in this game right now.

hope we find a way

For Rehydrated, you need to make a numerous buttons input spam to manipulate the fish AI, would be easy to do with TAS.