the gold one is certainly unreal. as digiman said, its not just yellow but gold. and the green base is omg. not sure how much it costs there's a thread full of super exotic frags but i only pick the BTAs lol.
the green one looks very photoshopped to me, but i dunno how to prove and the reasoning behind might be like wat binosage said, is to enhance the colours to the real thing.
the gold one is just abosultely beautiful. for a colour morph like that, i wont even mind decomming half my tank worth of corals just for that anemone alone!