Atm only the Zoi who caught a fish and put it in the tank can take a fish out again.
But it would be more convenient if each Zoi in the household would be allowed to do this.
There is no need for such a restriction.
I’m currently playing a Beach Hotel full of Zois and most of them enjoy fishing, so it’s a hassle to find out which of them caught the fish when I want to restock (or take the buggy fish out of) the tanks in the lobby 
