I've been getting a lot of questions about the Fush lately, it hasn't been my most featured board but I sure love to shape 'em and watching t.Rev ride his is a pleasure.
It's a pretty complex board both top and bottom, but in a nutshell it's usually got a flat front foot area and a concave deck on the back foot, with turned down rails and lots of hard edge. the bottom is a slightly vee'd nose transferring into a triplane middle with either a single or double concave depending on the fin setup for each particular board. The rocker is pretty flat through the back 2/3 of the board but has a nice lift in the nose for ultra shred capabilities.
Morgo Maassen shot the first two pics, Michael Kew got the warm-water one below...look for a few more from that session popping up somewhere epic shortly ;)