I bought a trimac at 1.5" from my LFS (labeled as a red dragon FH). It was my first flowerhorn purchase so I just went with it!! As it grew I noticed that it wasn't looking like a flowerhorn and after researching this site I do believe I have a female trimac. Looks very similar to the pick posted by bryan.olsen. She has the same black spot in her dorsal fin...is this indicate that it in fact is a she? Sorry for the thread hijack.
If its labeled as a hybrid, its a hybrid. Low grade FH's will look like Trimacs. I cull those instantly.