K. Dovii when around and inch and a half will start to show some color some of time (breeders useually hold on to the first few fish that show good color) and this is noticable only occasionally. A good mixed diet will also bring out color as well as mood. Female dovii will show some color but not even comperable to a male. At 6 inches your dovii should be getting some really nice coloring on them. Oh and as far as sexing with the anal fins spots, this is not always the case. I too have heard that every member of the parachromis family can be sexed this way and I have a jag female that has spots on her anal fin, and I have a buddy who has a female dovii with spots on her anal fin. The best way is to vent them (google venting fish for more info) I'm no pro at this and have personally never done it. The way I find out what the sex of my fish are is by putting 6+ fish in the tank and watching them. I hope I was more helpful then confusing!!! Cheers.
Anthony,
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180: rio coloradito & rio usumantica (temp combo)
4x F1 A. Lyonsi, 4x T. sieboldii = coloradito
2x T. meeki, 1x V. argentea = usumantica
150: lake nicaragua: 7x F2 sp "red" isletes, 6x H. Nicaraguense
150: lake nicaragua: 6x V. Maculicauda, 6x F1 A. Labiatus
125: empty soon to be: Rio usumacinta
110: lago izabal: 6x T. Aureus, 5x A. Robertsoni, 1x H. Bocourti
29: 2x T. Affinis, 2x Mollienesia latipinna
20L: lake tanganyika: 3x L. Multifaciatus adults, loads of fry.
Random growouts: 3x chuco micropthalmus, 5x astherhos altifrons