I'd say male plakats.
If you look at the anal fin it's extended longer than that of a female, and also comes to a longer point at the end towards the caudal fin.
A really clear pic would help, because the telltale giveaway is the ovipositor. It's a little white dot between the ventral fins and the anal fin, occasionally noticeable as a bump rather than a dot, specifically when she is ready to breed.