Aggressive female blue dolphin moorii?

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Plum7

Exodon
MFK Member
Aug 11, 2018
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Canada
Hi,

I have a group of 6 blue dolphin moorii and there are currently 4 females and 2 males 5 of them being sexually mature from 3-6 inches each 1 female is still young at 2 inches. I decided to buy another adult female dolphin moorii to make it 5 females and 2 males as i would like to breed them. I added the new female in and on the second day she's already adjusted to the tank and she was being quite aggressive towards the 5 bigger ones. She started flaring at all of them and even shaking her body at them and she became very dark and started to kind of dominate the group. She even chased one of the males who is slightly smaller around the tank for a short little bit but so far she has not done any damage yet just some chasing.

The person who sold it to me told me he is pretty sure 100% its a female as he saw it breeding in his tank dropping eggs but no male so eggs all just got eaten. She was the only dolphin in his tank full of peacocks. I know all fish have different personalities but i was pretty surprised to find that this female is really aggressive and dominant and showed typical male behaviour even towards the 2 males. I attached some pictures of her. Any help would be appreciated thanks.

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I hope she does not become a long term tank bully. My group of 6 are docile dolphins and were fine before she was added. One of my males used to be a big bully but as time went on he became completely mellow. I hope she does not hinder the group from breeding due to her aggression.
 
If the Moorii turns out to actually be female, IMO, quite a good pick up. A strong aggressive female has the potential to be a prolific breeder & good parent. Once the heirarchy is finally established things should calm down.
 
If the Moorii turns out to actually be female, IMO, quite a good pick up. A strong aggressive female has the potential to be a prolific breeder & good parent. Once the heirarchy is finally established things should calm down.
ok i hope this is the case i looked at her this morning and she is still a very dark dominant blue in colour and she was still pushing the other 5 adult dolphins around. She chases the bigger male as well still. I asked the owner and he told me its a confirmed female as she dropped eggs about 1 and a half months ago and just dropped eggs a few days ago before i bought her. I think she will likely become the new tank boss just don't want the other 5 to be stressed from her constant chasing them around.
 
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I've never had a female of any African Cichlid species be a tank boss while males were present, especially males of the same species, in the tank.
 
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I've never had a female of any African Cichlid species be a tank boss while males were present, especially males of the same species, in the tank.
The biggest male he used to be a big bully towards all the other dolphins when I first got him for the first few months then after awhile he changed and really mellowed out to the point where he’s a chicken now and gets scared easily. I hope this female will mellow out and hopefully fit in with the group.

i thought she will have a hard time fitting in my tank as she grew up as a single dolphin with other cichlids and no other dolphins present. She has only been in my tank for less than 2 days and she’s been like this since the second day. I’m very surprised but hoping I don’t have to put her on a time out or seperate her or something.
 
I've never had a female of any African Cichlid species be a tank boss while males were present, especially males of the same species, in the tank.
There’s young uaru and frontosa in the tank with them she never bothers them and the smaller dolphin only the 5 bigger dolphins lol.
 
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