Could be, I have one, if those flicks of color I see is gold in person, I can see why you are asking if it is a hybrid. If those flecks are more yellow it is likely a flagfin.
I would say hybrid, it happens more than you think, most of these conspecies breed together. Comparing the 2, I can definitely see the gold in the one vs yellow. The anal and dorsal fin is also more in common with a goldflake.