The first one looks like a blue (Steel or Royal unsure) with red-wash. The difference between a delta and a halfmoon is that a halfmoon tail is a "D" shape and spreads 180 degrees. Any less and it is a delta. So the fish has to look like this to be a halfmoon while flaring: <>D
The CT is a multicolour for sure. Iridescence doesn't count as green.