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Sexing these Fathead Minnow

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#1 JackieFisher

  • NANFA Guest
  • Delaware

Posted 11 March 2019 - 12:32 AM

Howdy folks,

I have a video of 2-3 inch fatheads swimming around and these have never been reproducing for months (winter-spring, room temp). I think some are male-ish by the more blunt head and dorsal fin, and some lack these features. Reproductive tube-wise they all have a tiny bit of protrusion down there. It is possible they are suffering from agricultural pollusion which contains sex hormones.

Any suggestion would be appreciated!



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