+1most likely they will start killing each other one by one till there is 2 maybe even 1 left,especially in a 80 gallon
I've seen so many of these threads regarding chromis. Some folks keep them in small reef tanks and tend to hold back on feeding, this is where trouble begin.
+1... But in all fairness Duke, you should warn them that this may take more than a few minutes to happen!Lyrtail anthias. Get all females then watch the dominant one turn male.