Talk:My Time at Portia/@comment-151.27.84.183-20190416201749/@comment-38109392-20190416215621

Hi! You're talking about this icon, right? It's actually the icon that shows you can feed your fish. You can read the Hunger section of the Breeding fish page for more information.

As for actually putting the fish in, you have to hold the fish that you want to put in the tank in your toolbar as your active item, then add the fish one at a time. I don't know the game controls for the Switch yet, but the tooltip prompt should tell you which button to press.