I was not trying to distinguish between any of the possible terms used. Anyone reading or researching on sunfish crosses does need to understand some basics like the difference between , fertile , viable , normal , abnormal and the different stages to which they apply. Also important are the terms cross , back-cross , F-1 , F-2, F-X , skewed sex ratio and reciprocal cross and others.

Last edited by ewest; 02/19/18 11:30 AM.