Maybe a stupid question, do fish have to breed with their own specie? Lol

Tttay89

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My Tropheus duboisi keeps digging holes in my substrate and laying in it. Which I can only assume is a nest attempt. Only problem is I only have one tropheus. So why is it doing it ?. I do have a julidochromis also and sometimes it does look like they do some weird vibrating side to side thing. Is this fish sex? Lol
 

Utar

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I don't have a clue except to point out that there are several hybrids very popular in the aquarium industry. These hybrids are not natural and created by breeders using different species. Flowerhorn is one that comes to mind.
 

Avel1896

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For example, any Poecilia can breed with any Poecilia :
Poecilia "uuppy" reticulata x Poecilia wingei ✅
Poecilia "guppy" tericulata x Poecilia "molly" sphenops or velifera ✅
In most cases fry is infertile.
So why is it doing it ?
2 reasons to me :
- atavism.
- stress : yours are alone and Tropheus and Julidochromis are schooling fish that have to live in group of 8-10.
Maybe their behavior influence each other.
 

Fishmanic

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Probably similar to Betas making bubble nests even if no female is around. Maybe he's hoping to a attract a female.
 

AbbeysDad

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Different species in the same genus can sometimes produce offspring hybrids which are sometimes sterile. It's unlikely that the two you mention are breeding, but perhaps going through 'pre-progammed' motions.
 

Sgooosh

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For example, any Poecilia can breed with any Poecilia :
Poecilia "uuppy" reticulata x Poecilia wingei ✅
Poecilia "guppy" tericulata x Poecilia "molly" sphenops or velifera ✅
In most cases fry is infertile.

2 reasons to me :
- atavism.
- stress : yours are alone and Tropheus and Julidochromis are schooling fish that have to live in group of 8-10.
Maybe their behavior influence each other.
sometimes fish get too desperate and try to mate with other species
one person got fooled to think that guppies and mosquitofish can breed 😬
 

Avel1896

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Mosquito fish isn't a Poecilia but a Gambusia so cannot breed with Guppy........ until it happens !
 

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