Tell me about your species tanks

Hello,

I have an empty 125g I am waiting to stock until I find the fish I want. So instead of having an empty tank I took 5 caudopunks out of a 30b and let them have the 125g. I have to say I am surprised how entertaining they are, they stay close together except for two (I'm assuming males) who claimed small portions of the tank. The territorial behaviors and stand offs are really interesting with the added room and besides the first day there is never any contact. I'm interested to see who decides to live where and if they will continue to live close together or spread out some. Once they get accustomed to the new tank I am sure I will have some spawning down the road.

I would love to hear about your single species tank and the interactions you observed. Including the tank size would be appreciated.

Looking forward to the responses,
Aaron