Today's update is on aggression...
(note: oscar = 8"; convict = 4"; salvini = 3.5")
oscar and convict
Oscar is boss, but he and the convict flare back and forth at each other whenever the oscar backs the con into a 'corner.' Convict sometimes lunges up at the oscar, with his gills flared, from a foot away. Oscar's response is to stand his ground and open his mouth. Majority of the time the con either submits or the oscar just slowly swims off as the con tucks himself away. Sometimes the oscar will simply lunge at the con, who then promptly retreats. Other than slowly swimming away---of his own accord---the oscar never 'runs' from the convict.
Most of the time they are not engaged in this sort of behavior, and they occupy a lot of the same swimming space together (usually with the oscar in the mid/upper levels of the water column; whereas the con sticks to lower/mid-water). Throughout this time, 'amicable' co-existence is possible as the con shows belly when the oscar gets close.
convict and salvini
Con has always made a point to stick his nose in the sal's corner of the tank. He used to make passes through the sal's territory, but now he seems to have let up a bit. Con still lurks around and shakes his head at the sal, but the salvini stands firm at the entrance of his territory and the con usually turns around and swims off. Out in the open, the convict will chase the salvini back to its territory without fail. This is not an issue during feeding time, as all three tankmates do the feed-me dance up at the front together with little incident.
oscar and salvini
Oscar will chase the salvini back behind the flowerpot, but mostly these two don't get a chance to interact (because the con is always interjecting himself into the middle of things).
While I'm almost certain that the oscar and convict could live out their entire lives relatively amicably together, I can't even begin to guess at how the oscar and salvini would get along---simply because the convict prevents the salvini from spending any significant time outside of its little corner of the tank behind the flowerpot.
In sum, I don't feel that anything needs changing, and I have no reason to believe that any of the fish are in any immediate peril, but I'd still appreciate some feedback. Any red flags stand out at anyone at this point?
BV
P.S. Thanks Jess!
P.P.S. Yup, he sure is, Katie. Soon be time to get more pics up in the oscar thread!