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Discussion Starter · #1 ·
I have a curious case of Marlieri bullying. I have two pairs of Brevis's, within a few inches of each other. They're seperated by a 1-2" 'wall' of shells. They're very entertaining as the Males & females will nip at each other if either dares cross the line of shells, but are content if they're on their own side....

Then i have a Marlieri, who is only concerned with picking on the pair that is the furthest back in the tank, and what i would say is also the furthest away from where the Marlieri calls 'home'. He only 'attacks' if he can see them, so i've put up a higher wall of shale to block his line of sight from his rock pile, but he does like to explore to the brevis side of the tank.
He'll chase them from their shells and then leave, with no real interest other then getting them off the substrate. He completely leaves the other pair of Brevis alone.

Any ideas why?
 

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Discussion Starter · #2 ·
My tank layout is like this:



I'd like to keep the two pairs in proximity to each other, as they're entertaining to watch. Not sure what else to try!

The Marlieri isn't hurting anyone, but i think it's probably leading to them not spawning as they're a little pushed around
 

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Discussion Starter · #9 ·
Also, would moving the rock pile from the left to the right, while the marlieri is pulled out of the tank, be enough of a disorientation of territory? or would it just do the same thing?

Any suggestions?
 

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My brevis tried to defend, but that didn't bother the julie. My brevis tank is only 24"x12" so I decided to keep the julie in my 55gal instead. It didn't matter much, because unless I pull the fry as soon as they come out of the shell, the other brevis eat them. They just don't seem to be good parents.
 
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