hi, I have 2 yellow tail damsels in my tank as I was cycling my 28g nanocube and recently added a six line wrasse( yesterday) . the damsels are outright intimidating and acting very aggressively toward the wrasse. I understand damsels can be territorial and aggressive. will they back off and let him be? or is this a case of futility and I either return the wrasse or get rid of the damsels. thanks in advance for any sound advice.