Black molly attacking dwarf gouramis

[Holly Harris]

I have a 105L tank, Last week I introduced 4 mollys, 1male 3 females all had been great, today we bought 2 more mollys, 1 black male and another female and 2 male dwarf gouramis. All fish are good together except the black male molly is attacking the gouramis the poor things look are hiding in the tank, I have ensured they have plenty of plants and ornaments to hide in, do you think the molly will chill out?