GBM vs garibaldi

[GovtCheese]

I am interested in adding a juvenile garibaldi (1.5-2in.) to my 240ga tank that is occupied by a sexed pair of GBM...
What kind of animosity am I expected to see from the GBM if any?

 

[Amphiprion]

I don't recommend you add a garibaldi at all. They aren't even tropical fish--they will live a shortened lifespan in tropical temps. That doesn't even include the fact that they are one of the absolute largest damselfish species in the world at ~29-30 cm.