LMB, Striper, Catfish, Carp, and Shad are the only fish I've caught, not saying there aren't more.
This is a close picture to the shad I've caught
I do KNOW they are smelt!!
They are Delta Smelt.
http://en.wikipedia.org/wiki/Delta_smelt
There are Largemouth, Green sunfish, Bluegills, Stripers, Carp, Catfish, Mitten Crabs and Crappie in the Duct. As far as sturgeon, I have heard rumors but have no confirmation as I have with the other species.
Yes there are smelt in the duct. The stripers I have caught recently are full of them.