Dies anybody remember a comic from the late 60's early 70's about a boy living in a post-nuclear city being chased by a lobster like being. It was a second part of the main book like brothers of the spear was to tarzan

I don't know if this is anything near what you're looking for but when I read the description my mind jumped to the DC character Kamandi http://en.wikipedia.org/wiki/Kamandi
If that's not it then Wikipedia has a list of post apocalyptic fiction here: http://en.wikipedia.org/wiki/List_of_apocalyptic_and_post-apocalyptic_fiction