The Mirror Carp is a rarer occurance and is a variation of the Common Carp and that is a nice one as Mr P says. Plus that is a nice sized fish for sure! Good picture! The other variation is called a Leather Carp with little to no scales, or a sparcely scaled Mirror but again just a variation of the Common Carp. Body language and that flash of their mouth of whiteish yellow that occurs when the suck something in are the only things that save us in murkier or deeper water.