Strawberry Dottyback does not like his new friend

[razor vampire]

My Strawberry Dottyback and Goby aren't getting along. I just add my Strawberry Dottyback yesterday. They're both in a 12 gallon.
Help!

 

[razor vampire]

Also would a clown fish handle my Strawberry Dottyback? If I take out the goby.
Grrr I just want to put a dwarf lionfish in my 12gal to take revenge to evil Dottyback. lol 12 gallon too small.