OK, I guess I get to update my own question

Went back down to the spillway last night with my reel freshly loaded with 50 lb test braided line. Put a two ounce sinker on the end of the line, added a couple of dropper loops above that and added two curly tail jigs. My daughter came as well, she had two crappie tubes set up the same way.
So we started casting. We could see the backs of some fish breaking the surface almost continually - the place was packed with fish. Anyway, my daughter hooked the first one. Nice fish, about ten pounds. We landed three more all about that size, and then something just about yanked the pole out of my daughter's hands. It broke off almost immediately - broke off 30 lb braided spectra line! My daughter's words: "Dad, that was awesome and sucks at the same time!"
I landed the last one, a 16 lber. Not bad for a first outing.
As I said before, the interweb says these fish are filter feeders; but they sure go after lures. Hard to hook, though - I must have gotten 10 strikes for every fish I managed to hook.
Oh yeah, here's a _link_ to the fish I'm talking about:
Bighead (Asian) carp