That wrasse above is not a Christmas wrasse. It is a Red-Scribbled Wrasse. Christmas wrasse is a fall-back name that many distributors or LFS owners use when they see a fish that remotely even looks like a christmas halichoeres. I can't tell you how many different wrasses I've seen labeled as Christmas wrasses that weren't even halichoeres. At one time it was classified as a Ornate or Halichoeres Ornatissimus, however that quickly changed because biologists observed that the black circle in the center of the dorsal fin of this fish does not fade away as it grows from a juvenile to adult. Most halichoeres that have these circles on the dorsals (such as an Ornate) usually have them fade away as they become adults. But not on this particular halichoeres. He keeps these black circles for life as a tatoo.
The red-scribbled comes from Indonesia or Japan....basically the Western pacific.
In a reef aquarium these fish won't bother corals but they will go after invertebrates such as snails, small crabs, or ornamental shrimp. They also grow fast and are very active swimmers