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Breeding zebrafish

  • Hi. I'm an absolute novice at breeding zebrafish and was wondering if anybody came across the following problems.

    My fish are 3 months old and breeding resulted in many eggs, but the majority of these were small and abnormal. They had a very condensed irreglar yolk. In addition, there were lots of bits of what looked like an empty chorion - looked just like an empty sac.

    The other thing was that breeding wild type fish was successful with many normal looking embryos, but after 72 hours in egg water (with a small amount of methylene blue), there seemed to be a lot of parasites which seemed to have invaded the eggs and pretty much destroyed them.

    Any advice?



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