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The fish I have in my 100litre tank:

1 x zebra danio (female)

1 x long finned danio (male)

1 x pearl danio (male)

1 x albino white cloud (male)

2 x white clouds (females)

1 x tele goldfish

Nitrates- 5

Ammonia- 0

Nitrite- 0

pH- 7.8

WC yesterday (80%)

My female zebra danio has started to behave like a little madam and aggressively chases the others. Littles fights and chases break out between everyone once in a while but this is becoming persistent and its always her now that seems to do the bullying. I've put some small dividers at the top which they can swim through, but I thought it would break up the chasing a little and give them a few more places to hide. It has helped but she is still targeting everyone (except my goldfish thank goodness). Is there anything I can do?

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She's probably displaying breeding behaviour. You've got two males to one female, two being a separate breed. I would keep each danio breed at a ratio of 2:1 females, which might reduce breeding behaviours. It's usually the males harassing the females, but females are just as capable at harassing males :P

You can separate her for a while and see how she goes, but other than that there's probably nothing else bar time

Edited by Narny105

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So do you think I should get 2 males of her type?

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Only if you want to get more danios. I don't know whether it would help ease the issue or just give her more fish to chase. You can just isolate her for a while and see if that helps first though.

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Ok, thanks Alex, I'll try that :)

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Danios need to be in groups of six or more to stop aggression. So I would get more long finned and the zebra's. I believe the pearls get rather big (correct me if I am wrong) and may need a new home.

Good luck Hope the goldfish does not eat his companions.

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Haha, googles takes no notice of them :)

I thought so, I got all the little ones over 2 years ago and of course I listened to the lfs lady that it would be fine.

I'm guessing one of them is a pearl but not sure. I took some pictures...

He's the one at the top, facing the camera

39cc9ee0d982038932e93a939626cf72_zps304e2922.jpg

He's the one on the top right

f20075c342bac1a4161367f9ccadbc24_zps5a8f643f.jpg

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Yep pearl danio grows to about 2.5 inches best kept in groups of 4 or more! :-)

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Thanks!

I don't know what to do really. I don't think the tank is big enough to get any more :(

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Thanks!

I don't know what to do really. I don't think the tank is big enough to get any more :(

if I get an aggressive fish I usually take it back to the shop!

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My suggestion is rehome the danios and get more white clouds.

Sent from my iPad using Tapatalk

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