FH and Rosy Reds are both FH. While I have not seen it written I assume they will spawn interchangeably since they are the same species.
From SRAC :
(Pimephales promelas)
The fathead minnow has a thick
body with a blunt head and small
mouth. Fathead minnows are normally
dark olive on the upper
body, with a lighter silvery shade
below, and have a black stripe
along the middle of each side. The
"rosy red" fathead minnow,
developed by Billy Bland Fishery,
is orange shading to a lighter silvery
orange on the lower body.
Male fatheads generally are larger
than females; during breeding,
normal-colored males develop
black heads with several rows of
small breeding tubercles (bumps).
Last edited by ewest; 01/03/08 01:43 PM.