What do you think? :)
"The male is sterile because he got my other guppy pregnant." Hello?
Was the female with the back problem in with other males? Has she ever dropped? If not, while your concern over having fry from her breed with other guppies is legitimate, it isn't likely a problem.
Besides her questionable fertility, you do have her separated from other female guppies and that is wise. Simply don't save her fry, if she ever has any.
This phenomenon is call Scoliosis. If you go to the Immediate Help area, you will find reasons for it happening in
Spinal Deformity
Guppy Scoliosis?
ATB!
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