Unless of course youre adding it to a tank with fish that are more aggressive than even IT is...case in point...
Today I was rearranging tanks at work (work at LFS) and decided that the Lunare Wrasse could hold his own in a tank with an Undulated Trigger...figured that the wrasse was mean enough and fast enough to survive...WRONG ANSWER. I even attempted this by taking them out of their seperate homes and putting them in their 'new' digs at the same time. It took all of about 2 mins for the trigger to take serious chunks out of the wrasse...had to take it back out and house alone. He wasnt looking good when I left work, hope he makes it.