Hawkfish compatibility (with other hawkfish)
 

How well can two hawkfish (of different species) cohabitate? Can there be territorial issues?

Say, for example, a flame hawkfish and a falco hawkfish (and assuming the flame is the incumbent resident in this situation)

I had a Flame (who was the incumbent resident in this situation) and an Arc Eye together for about 2 years in a 90G. The Flame was in the tank for about 7 months when I introduced the much smaller Arc Eye, which quickly caught up in size. They did squabble time to time but it was usually over a piece of shrimp or squid they both wanted during feeding time.