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Blue chromis aggression

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Blue chromis aggression

Postby Liamnhayley » Sat 15 Oct, 2016 1:31 pm

I had 4 blue chromis and 1 of the 4 beat the crap out of two and they died of stress I believe. The third is heading the same way and the bad arse has started on the other fish to now. I thought these fish were peaceful! What should I do?
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Blue chromis aggression

Postby swazzle » Sat 15 Oct, 2016 5:22 pm

Peaceful towards other types of fish.

The reason some tanks can have schools is usually because of other larger fish in the tank. In the wild one of the main reasons fish school is for safety. Without the requirement of safety often the dominant one will pick off the fellow chromis. (Just my assumption)

Also while there are standard rules of thumb all fish can completely obliterate those rules. But it is common in most tanks for this to happen, not being disrespectful in anyway but fully researching fish before you purchase them can help save a lot of drama


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Re: Blue chromis aggression

Postby wayne2.0 » Tue 18 Oct, 2016 11:35 am

Catch the 3rd one before it happens.

Never seen this, I have noticed (as have others) that in a tank that they feel un-threatened, they often stop the schooling. Which is a shame in some ways from a visual point of view.
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Re: Blue chromis aggression

Postby Vilante » Tue 18 Oct, 2016 11:41 am

I started with 5.

One disappeared in a week, found dead under a rock.

One disappeared in the following week, never found again.

The final 3 (the stooges) have lived on for 18 months and get on like a house on fire. They just needed to soothe their thirst for blood first.
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Re: Blue chromis aggression

Postby Liamnhayley » Tue 18 Oct, 2016 7:33 pm

Vilante wrote:They just needed to soothe their thirst for blood first.


Lol

Bit disappointed. Was hoping they would be peaceful. Might have to get rid of the bully and try some others, real shame he's in tiptop shape!
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Re: Blue chromis aggression

Postby Vilante » Tue 18 Oct, 2016 8:22 pm

Liamnhayley wrote:
Vilante wrote:They just needed to soothe their thirst for blood first.


Lol

Bit disappointed. Was hoping they would be peaceful. Might have to get rid of the bully and try some others, real shame he's in tiptop shape!


I have heard them getting down to 1 and staying there too, and have seen 9 of them happy in one tank. Probably all luck.
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Re: Blue chromis aggression

Postby Liamnhayley » Sat 05 Nov, 2016 11:06 am

I hope I'm not speaking to soon but I think I've solved my chromis aggression problem.

I placed the little bastard in solitary confinement (QT) for a couple weeks and put 4 new chromis in the display tank so there is an established, peaceful school. I put the bully back in a few days ago and he is happily and peacefully swimming with the others of his kind which I never saw him do previously. 5 happy chromis = 1 happy Liam!
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Re: Blue chromis aggression

Postby Gats » Sat 05 Nov, 2016 9:17 pm

Glad to hear it!

I'm with swazzle on this issue. My 5 beat the crap outta each other during QT/treatment. Went into the DT with frayed fins and a bad attitude, but were immediately peaceful when the dropped to the bottom of the food chain. Foxface, velvet damsel and clown pair. 6mths later and all still alive and all still peaceful.
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Re: Blue chromis aggression

Postby pyroay » Sat 04 Feb, 2017 11:45 pm

1,2,3 or 20 works. More than 3 seems to be a bad number especially in 4-5 foot tanks.
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Re: Blue chromis aggression

Postby Rod the Reefer » Thu 09 Feb, 2017 11:22 am

Very common behavior unfortunately. Many, many reports of the bully picking off the others until there's only the bully left.

I know of a success story though. A friend of mine put 25 into an eight foot tank and they've been fine.

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