Breeding Emerald Eye Rasbora

[juliehainsworth]

Hi does anyone have any tips on breeding emerald eye rasboras? I am almost sure I have male and females, as I have some larger and smaller and I am basing this on the differences between my male and female glowlights!!!! I would be grateful for any tips that may help me to breed these fish

 

[The-Wolf]

what do you mean by emerald eye rasbora?
do you mean Rasbora dorsiocellata or something different?

 

[mikev]

Hmm, can I ask the same question with another rasbora?

Mine are almost certainly Rasbora borapetensis (Red-tail Rasboras aka Black-Line Rasboras, sold by the lfs as "Brilliant Rasbora" which they are not). Accordingly to a faq link below

http/tropicalresources.net/phpBB2/fish_p...orapetensis.php

sexing and breeding is difficult. Sexing actually does not appear difficult, they seem to have the same shape variations as, for example, danios: bigger "chests" ought to indicate females. Breeding I have no idea about---I had mine nine for more than a year, and they do not ever exhibit anything like sexual behavior.

While we on the subj:
Notice that the faq above gives their size as 3in, while the size list on this forum,
http/www.fishforums.net/index.php?showtopic=106493
lists them as
4cm/1.6" Blackline rasbora Rasbora borapetensis

The bigger ones of the nine I have are larger than 1.6" (close to 2"), so at least the faq here is slightly wrong, but I don't believe that 3" is possible either.

(The other faq linked has one more error: is nearly always in motion is untrue.)

 

[RedShark]

What about their lifespan? How long are bora bora rasbora expected to live?

 

[mikev]

What about their lifespan? How long are bora bora rasbora expected to live?

I'm curious myself, there is nothing on the web (but then this is not a very exciting fish, so perhaps most don't care). When I bought them (fully grown) in Sep of 2004, lfs said 2 years. I lost one of the original ten due to what might have been an old age disease, but the rest are doing fine. I suspect that the answer is about 6-7 years.

 

[The-Wolf]

Mike
I have some blackline rasboras and the largest is approaching 2.5", so I do belive that 3" is possible.
my research of some Japanese sites suggested that 10years is possible for this species of rasbora.
as for breeding I havn't attempted it properly, although they did spawn one morning, quickly persued by the danios eating the caviar

 

[mikev]

Very interesting, thanks!

Maybe it is worth fixing your size list then, it still says 1.6".

(OT: My interest in breeding is mostly because I realized that I have no experience with it, and even if the khuli experiment succeeds, I'll probably screw up with handling eggs. So I perhaps should try with some simpler fish first, and rasboras is the only choice: the two breedable species I have, of danios and barbs, are not fully grown yet.)