Topic: Ctenops nobilis — Seriously Fish

Ctenops nobilis

This topic has 0 replies, 1 voice, and was last updated 11 years, 2 months ago by Matt.

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August 6, 2011 at 5:18 pm #301633

beta
Participant

Had moved a couple of Ctenops brooders to a separate tank and finally spotted the fry yesterday. I have fed them on BBS today. Fingers crossed
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August 7, 2011 at 2:36 am #344871

nuchal man
Participant

Congrats on the spawn and those are some great pics, it’s not an easy fish to get fry from. Here are some bad photos of the ones I was working with at the Shedd Aquarium in Chicago when I was interning there. The babies have an adorable color pattern.

Male

fry from one of our spawns

another bad photo of one of the fry

August 7, 2011 at 9:02 am #344874

Colin
Participant

Good pics none the less!
August 7, 2011 at 9:47 am #344877

Stefan
Member

Well done both of you!

They certainly represent an interesting ‘niche’ in labyrinths Colin!

August 7, 2011 at 10:40 am #344880

Matt
Keymaster

Brilliant.
August 7, 2011 at 2:54 pm #344890

beta
Participant

Sam: Those are some excellent pics. Do you recall how many fry per spawn you got. I count less than 10 in my tank. What did you offer as a first food?

Matt: I keep mine in fairly hard water and the temp is around 28 C. I think we need to update the knowledge base article as I feel they are paternal mouth brooders. Maybe Sam can verify?

August 8, 2011 at 7:31 pm #344921

nuchal man
Participant

They bred in a community 500 gallon asian community display. The water at the aquarium is from Lake Michigan and is about 7.6-7.8 pH and it’s very hard, pretty much liquid rock. There actually was an ich outbreak on the display and some salt was added to the tank. They spawned after a few water changes from this point.

Water temp was around 78-80F. I completely agree with Beta, they are a paternal mouthbrooder. I was surprised at the amount of fry the male was holding. He spit about 70, and they are pretty good size. First foods were baby brine shrimp and copeopods.

I found this species to be jumpers and I had issues with high levels of conspecific aggression, even in a 500.

August 9, 2011 at 6:50 am #344925

Matt
Keymaster

Thanks for the info guys, will make the necessary changes asap. Are both sexes aggressive towards one another?

August 9, 2011 at 9:02 am #344928

nuchal man
Participant

I didn’t see any difference in aggression between males and females. For such a fragile fish, they can be quite nasty to each other.

August 18, 2011 at 3:25 pm #344996

beta
Participant

Only 3 survivors!
Here is a video of one of them taken on my mobile cam.

View Original Movie

August 30, 2011 at 9:35 am #345045

Matt
Keymaster

Oh no.
November 9, 2011 at 4:18 pm #345994

Matt
Keymaster

Colin and others, what level of intraspecific aggression have you experienced with this species?

November 9, 2011 at 4:34 pm #345996

Colin
Participant

A lot!

Once you get a dominant fish they keep harrying the rest of them, I have 6 in a tank now and you always have a dominant fish

BUT there are no injuries and no split fins, just chasing

November 9, 2011 at 4:46 pm #345997

Matt
Keymaster

Is the alpha individual male or female Colin, or does it vary?

November 9, 2011 at 5:31 pm #346000

Colin
Participant

I dont know how to sex them yet…. will keep an eye on the ones i am keeping though
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