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Aggressive behavior of small guppies
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Caton
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Joined: 28 Jul 2009
Location: Washington State, USA

PostPosted: 2010.08.02(Mon)4:53    Post subject: Reply with quote

Haha, I didn't really know how to word it...
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svkr2k
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Joined: 28 Mar 2010

PostPosted: 2010.08.02(Mon)17:41    Post subject: Reply with quote

I apologize for the confusion !
rales12: Thanks for clarifying.

So:
Larger guppy shown in the pic : Male.
Smaller guppy : Male.

I'm surprised to hear that eventhough the larger one is a male, the smaller one is trying to mate with it!
Thanks for clarifying daidemhill, caton, rales12.
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svkr2k
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Joined: 28 Mar 2010

PostPosted: 2010.08.03(Tue)18:05    Post subject: Reply with quote

Today morning, I noticed a creature in my aquarium that looked like this:
http://www.flickr.com/photos/svkr2k/4859083565/sizes/m/
(Sorry for the rough sketch, I couldnt get the picture. I will try later.)

I currently have 7 guppies and 2 zebra danios in my aquarium. Is it a fry?

(Please note the dimensions shown in the pic. It looked like a disc swimming in the water.)
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invertmaniac
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Joined: 22 Dec 2006
Location: Wheaton IL

PostPosted: 2010.08.04(Wed)8:32    Post subject: Reply with quote

You would recognize a baby guppy if you saw one. It could be a horribly stunted baby guppy, or a danio that has survived hatching. If you have any live plants it could be some invertebrate that came in on them.
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monstrosity
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Joined: 16 Oct 2009
Location: Tennessee, USA

PostPosted: 2010.08.04(Wed)12:00    Post subject: Reply with quote

I have seen extremely small creatures that look kind of like that in my tank before. I had four zebra danios at the time, so it could very well be one of your danios.
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svkr2k
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Joined: 28 Mar 2010

PostPosted: 2010.08.07(Sat)3:34    Post subject: Reply with quote

Few days back (last weekend), when I switched on the lights in the morning, I saw all guppies & zebra danios swimming either in the middle of the tank or near the surface, except one guppy. He was hiding behind a rock and I thought that it could be because of some disease. He didn't eat food.

After a couple of hours, I did 20% regular water change (water treated with Stress Coat and Stress Zyme) as usual. No medications.
He was not moving much the next day also, and no food.
Nest day, to my surprise, he started swimming like the other fishes and started having food. (he rushes towards the surface whenever I go near the tank anticipating food, I think).
I could see lots of damage to its fins/tail. He swims around the tank always, mostly in middle & bottom portions of the tank.

Next day, I noticed a strange creature shown here:
http://www.flickr.com/photos/svkr2k/4859083565
(Not sure, if this is related to the above event).


The following picture shows it's damaged tail. It was very beautiful last week Sad
http://www.flickr.com/photos/svkr2k/4869378308/

Please help me find the root cause of this problem.

Stock in my tank:
7 guppies,
2 Zebra danios
1 strange creature shown in the pic (I could never see this creature again!)
Tank is 40L, few plastic plants, rocks, 200Lph internal filter, airpump
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rales12
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Joined: 03 Nov 2009
Location: Wyoming

PostPosted: 2010.08.07(Sat)3:59    Post subject: Reply with quote

svkr2k, do you have any female guppies at all? (There are pictures of female guppies if you scroll down a bit on this page.) If not, then you can safely rule out the tiny creature being guppy fry, and can probably call it danio fry. And if you can't find it again... it was probably made into a nice tasty snack for somebody. Smile

I can't say for sure why the tail is damaged on your guppy, though. How are your water parameters? What is the tank size? Have you noted any fin nipping from any of the other fish?
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svkr2k
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Joined: 28 Mar 2010

PostPosted: 2010.08.07(Sat)11:19    Post subject: Reply with quote

Hi rales12,
There are no female guppies in my tank.
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monstrosity
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Joined: 16 Oct 2009
Location: Tennessee, USA

PostPosted: 2010.08.11(Wed)8:40    Post subject: Reply with quote

Zebra danios can be pretty bad fin nippers at times.
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Last edited by monstrosity on 2010.08.12(Thu)12:49; edited 1 time in total
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svkr2k
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Joined: 28 Mar 2010

PostPosted: 2010.08.12(Thu)2:17    Post subject: Reply with quote

Hi monstrosity,
You are probably right. Whenever I go near the tank all fishes come to the surface anticipating food. One zebra danio starts chasing all the guppies away from the surface (probably to avoid competition while eating?). Does this indicate the aggressive behavior of zebra danio?
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