We need to be able to put them in the fridge, take them out and cook them either in a pan or grill as well. even when it's over an open fire they do not specify what we are cooking so it's not the one in our inventory as far as I know they just let you cook a fish. (even on Sims medieval you could keep your fish in a fridge to keep it fresh for cooking or giving away, I liked that in sims medieval that you can add as much food as you wish to the fridge and even full a friends fridge or the fridge at the Kings or Queens castle.)
We can keep them in fish tanks but they are still foul there. and can make your home smell. It's better just to delete them. I would like to be able to throw them back in.
Even when the family's fish together they do not communicate so no social. Same as some other family get-togethers on sims 4 like bowling, the social go down and not up, kind of takes the joy away. looks like they are having fun together but they are not. Maybe the programmers fool them into thinking it works but it did not.