White Perch Below Conowingo Dam

Type: Chesapeake
Region: Northern
Location: Susquehanna River

I caught this nice 11 1/2" white perch below the conowingo dam on Sat. May 22 along with some nice catfish and 2 white shad between 3-4 lbs. each. I seen some signs last year about the flathead catfish. Are we still suppose to dispose of them and not throw them back into the water?

DNR response: There should still be signs up, please do not return any flathead catfish you may catch and do not move them to other waters.Don't spread fish arouind.