Aaron-
I don't know too much about surf fishing Manhatten beach since Im from San Diego, but my girlfreind lives there so everytime Im in town and bored I fish the Jetty around King Harbor. A lot of croaker and some pretty decent Barred surf perch. The spots really no secret there always a gang of other people there. Also If you want perch, inside the harbor I always see a ton of big Sargo, and if you throw small swim baits or grubs there is a ton of small halibut and sandies around the dock pilings. But if your in for the eatin fish that probally would nt be the best place. Hope I didnt tell you something you already know. good luck! Catch n' release.
Garrett Ford