I know it is not the roach, but it is more similar to it than to grass carp, i said that in my first post.
This is a grass carp aka "amur"(its east european name) it is a completely different fish from the one "kidd" posted.
This thread reminds me of two guys at BPS while they're staring at a rainbow trout in the tank, one is saying it's a musky while the other one is convinced it's a walleye. One guy was from Ontario the other from Airdrie.