Not even sure it would be an educated guess. I have seen pure Flas that look just like northerns and vice-versa. With F-1 and FX it is the same, some look like one parent and others the opposite parent. There is a lateral line scale count that is supposedly different but that is very hard to do a count of on a live fish. Further I do not know what the scale count would be on an F-1 or FX vs either parent. One trait of Fla genetics (not an answer but an indicator)are vertical lines around the face. I will find a pic of this and post.


These are F-1s - see odd stripes on head and mottled look.







Last edited by ewest; 03/16/17 11:50 AM.