Need Goldfish Help

In my grandma's minibow 2.5, as you have probably heard about, is a fantail goldfish that has a mix of orange and white all over his body. He is pretty small, under 1" and he has a tankmate of another fantail goldfish with the coloring of a shubunkin and the same size.
The goldfish I mentioned first has something wierd on him. It looks like a 1/3" brown string hanging from his tummy. I should be able to post a pic later. I don't think I have the genders wrong, but on goldfish I don't know how to tell. Could this fish be getting ready to spawn? Lay eggs? Or anything related?

Thanks!

~Paige

Now its gone.

*wrinkles nose*You think it was poop?

~Paige