A kok or fin shape is not an indicator of a male. Females can have long pointed dorsal fins and big koks as well. Keep in mind that our beloved flowerhorns are hybrids, so sometimes a typical method used to determine the gender is wrong. My bet is the the fish pictured above is a female. No double flower or plum line, which can create a situation where males appear to be females, and yet we see a black spot on the dorsal fin. This flowerhorn appears to be a female.