RBSF and CP Tohickon above the lake. Limited CP in Haycock, as it suffers from annual very low flows. Possibly some SMB and LMB in Tohickon above the lake, but if so, not much of a population of SMB. Could be fair numbers of LMB a short distance up from the lake since Nockamixon is one of the best if not the best for EF catch rates of 15 inch and longer LMB in the state in recent times. CP continue up through Quakertown and beyond, with some pretty nice size ones for a creek. Headwaters wooded, but suffer from low flow and low gradient. Trout unlikely.
Possible that Walleye used to run into the first pool above Rt 573 during spawning, as under Rt 563 was a well-known prime spawning spot, but numbers in lake now exceptionally low, so not worth targeting. Probably a better chance of finding a muskellunge in that pool these days, as Nock is also one of the top lakes in Pa for Mky abundance.
Putting all of this into a historical perspective, the lake fishery was pretty poor overall in 1985. It had overabundance of white perch and a history of water quality problems. White perch pop almost entirely starved to death over the winter of 1985-86 after nearly cleaning out most of the YOY of other species for a few yrs. Times change and stockings that followed combined with reproduction of species that remained plus improvements in water quality were boosts for the fishery. White perch never returned except for the very low density population that remained and continues today.