i had CPOs and breed cajuns today.
have about 30+ in a 10g moss jungle along with cherry shrimp.
CPOs remind me of the highlander... 5 were kept in a deep blue 5 partition tank as i didnt want to breed them just yet before setting up a separate 10g however the male spent the day trying to climb into the next compartment to duke it out. I would literally lose 1 cpo a day for a week until there was one...
the Cajuns started out in a bare tank for a few weeks with driftwood, plants mosses and shrimp added over several weeks... they have been continuing to breed so i would wager their aggression is way lower than the CPOs. im not sure if this is common or just the ones i had, but the Cajuns are slightly smaller than CPO if only by 1/10th of a tail fin.
I absolutely love their posturing raising their claws at each other , with niether wanting to take the first swing... they are very entertaining and pretty much leave everyone else alone.
"I am Groot", the faithful protector