Fishpond
It is where your fish from the ocean is stored.
go here to access it.
then it will show up like this if you have been fishing a little
Every tier of fish has different kinds of items that will be produced. You can just long-tap the fish you want to see, then this will show
You can feed it one by one by selecting/multiselect it first then this will appear
or you can just mass feed them!