fish behavior

[gmann]

Can someone please explain WTF is going on....

My Lineatus has recently started to change color. Since i have started the tank in March there has always been some mild chasing between the Katoi and lineatus, but in the past few days it has got to the point where the lineatus has gone into hiding.

I first thought to catch and eventually get rid of the aggressor (katoi), however after doing that, i notice every other fish in the tank is goin after the lineatus. My laboutei which is docile as hell, and been with the lineatus in my other tank for over a year, has as joined in the chasing. Even my bartletts have decided to take a break from each other and joined the cause against the lineatus.

The obvious option is to remove the lineatus, but it is my favorite fish, and given that its always hiding i doubt i'll be able to without destroying my structures.

Can anyone explain this social behavior? Tank params are 220g, lots of rock to hide in.

live stock:
lineatus - wuss
katoi - bully#1
laboutei - docile, but now bullying lineatus
temicki - bully #2, but not as much
pintail - seems to be at war with bartletts
bartletts x 5 - they are in their own civil war
potters angel - minding its own business