They’re touchy especially after ship and often develop skin issues. Best us to freshwater dip and give them a formaldehyde based bath before introduction
i have one that hangs out with my clown fish they are buddies when my two yellow damsels don't chase him around or my 6 line. but my 6 line is a jerk. my blue green is pretty timid. i just dumped mine in and had him for over a year
I bought 8 blue green to start my tank . One must have had a hard time with the transition from pet store to my tank and got pulled in to my wave maker. Down to 7 ! One year later a fellow reefer was taking his tank down and selling
everything. He had 1 chromis so I gave him $20 for it. Today they are all accounted for plus there eggs have hatched and the fry are in my sump no clue how many but there is a lot about 1/4 inch long.