The Shedd Aquarium unveils three giant new Bighead Asian Carp. But just where were they caught, and what does it tell us about the battle to keep these invaders away from the Great Lakes? 

Need some ideas for what to do this weekend? Chicago Tonight knows what is going on!

Teaching sharks to wait their turn for food. We show you some of the pioneering training the Shedd Aquarium is doing to get exotic animals to follow directions.

We take a look at the Shedd Aquarium's efforts to harvest sustainable produce in their organic gardens.

We take a look at the Shedd Aquarium's efforts to harvest sustainable produce in their organic gardens.

It's a boy! A baby dolphin joins the Shedd Aquarium.