I am truly confused.

I took the wife and kids to the Shedd yesterday.
First:
While looking at the "Illinois Lakes and Rivers" exhibit, the kids kept asking "Is that a meat eater?" This occurred at every tank. Finally MY WIFE says "don't worry, those fish are too small to eat you." A comment like that should have banished her to the dog house. (See below)

Second:
The "Illinois Lakes and Rivers" exhibit has trout, salmon, perch, bluegill, crappie and walleye in it. These are all tasty fish. Seeing them in great numbers made me hungry. Unfortunately the restaurant in the aquarium does not serve fish! Why not? You have plenty there that you can put on the menu!