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aggres­sion of sphaerichthys vaillanti

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9 years 1 month ago #381 by Jacob
I had a pair and two extra males, tried to reduce it just to the pair, but this made the pair fight and so had to rein­tro­duce the other two males. Of course the aggres­sion towards the extra males has wors­ened, and there is even some aggres­sion between the pair that lingers though they mostly went back to being a pair as soon as they had other fish to direct their aggres­sion towards.
The chas­ing seems to be only when I feed them, and the other fish are still able to get food but it seems the female of the pair is more deter­mined to bully the extra males now.
Shouldn’t have dis­rupted the fish, there was some chas­ing but it’s worse now. I mostly see pairs of vail­lan­tis on youtube videos but the bond was not the same with my fish.

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9 years 1 month ago #387 by helene
I think what you describe sounds like what we have been dis­cussing before with choko­late gouramies, that to have a small ‘flock’ is good in order for agres­sion to be dis­persed, or maybe more to keep a nat­ural hier­aki, — so at least bring­ing back the cou­ple of males was good in order to make the pair ‘bond’ — as I under­stand it.
Arent fish always more ‘agres­sive’ around feed­ing ? When I had the big­ger gouramies — gold, pearl — I learned that it seemed that the dom­i­nant male would ‘allow’ the females to feed when food was there, but then after he would have to ‘re-​affirm’ his dom­i­nant role and would chase them a bit extra, so they didnt ‘for­get’ that he was dominant.

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9 years 1 month ago 9 years 1 month ago #388 by Jacob
I don’t know how good their mem­ory is, I see them swim back into dan­ger right after they get chased, in par­tic­u­lar a female that is the only fish with no part­ner will get chased and then some­times wan­der right into the ter­ri­tory of the fish that just chased it.
Maybe it’s just their nat­ural behav­ior not work­ing in a small space where in the wild they would have escaped.
The two pairs seem to know the invis­i­ble line that divides their ter­ri­to­ries. Right within eye­sight of each other, they will dis­play and only if a fish has gone over the line will a seri­ous fight break out. Usu­ally when a fish has gone over the line it will sub­mit and back off, at least that’s what the weaker pair will do if it knows it is in the dom­i­nant pairs ter­ri­tory.
I tried to aquas­cape the tank with as many roots as pos­si­ble, but remov­ing them and leav­ing the tank mostly empty except for float­ing plants and a few roots has dras­ti­cally improved the aggres­sion prob­lem. I had to dis­rupt them to try and reset the peck­ing order. Some­times it seems like if the fish see each other it actu­ally helps them avoid fight­ing. Reminds me of when I had a tank full of carinote­traodon lorteti and break­ing up the lines of sight just meant they could ambush each other and get a few bites in.
I didn’t even know I had three females before redec­o­rat­ing was suc­cess­ful, but all of a sud­den they had their color on. Their ter­ri­to­r­ial behav­ior is inter­est­ing and it seems like a large group really is impor­tant, maybe if you have ten or a fairly large group they will “school” some­what. Or maybe they will just break up into pairs and the crowd­ing will not help at all. The pair I had that I tried to keep alone proved that they atl east need other fish to redi­rect their aggres­sion away from each other.
Last edit: 9 years 1 month ago by Jacob.

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9 years 1 month ago #389 by Jacob
It’s true at feed­ing time they’re the most aggres­sive, I just looked at them and three of them were in one cor­ner motion­less while two oth­ers were at ran­dom places and motion­less, all of them fac­ing in the same direc­tion. They seem like there must be very lit­tle aggres­sion when they are left alone for most of the day. Maybe they ben­e­fit from each oth­ers com­pany dur­ing that time period.

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9 years 1 month ago #390 by helene
:) Now you have got me hooked, — from sat­ur­day I will have 8 lit­tle sphaerichthys vaillanti’es swim­ming in a 60 liter tank. They are pretty small, only six months and 3 cm big.
I am really look­ing for­ward to get­ting more expe­ri­ence with this beau­ti­ful fish, and will of course share if I learn some­thing :)

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9 years 1 month ago 9 years 1 month ago #391 by Jacob
Mine were prob­a­bly about that size at first, they’ve got­ten big­ger pretty quickly so maybe that’s right when they reach adult­hood.
They pair up fast, but I read they take time to mature and breed. I haven’t had mine breed yet though there are two pairs, you’d think they wouldn’t waste too much time, maybe there’s a rea­son they haven’t yet.
Last edit: 9 years 1 month ago by Jacob.

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