i just posted this on your other thread:
Hi, I will try to help but I have a horrible track history with 6-lines, it took 4 attempts before I got a healthy one... it wasnt my fault! stupid shippers with no heat pack in february...
As for your wrasse, I have never seen the red area in a healthy 6-line, but that is a worry-some area for me. From the picture his scales appear to pucker and has white spots so it lookes like he has an internal infection with ick, but are the results of a weakened immune system and stress. The hawk might be a factor adding to it but it isnt the main cause. You might have to worry about the 6-line's illness speading in your tank and hurting the other fish. You need to ask for treatment for an internal infection and there are lots of ick/external illness threads which will help.
If the wrasse is eating well and you feed with high quality meaty foods he might have a chance but when/if he stops eating have the net near by