Yellow finned? Maybe some pics?
The melanochromis is probably a Johanii but would need pics to verify.
Yeh you should have around 15 in that tank. It might be better if you stick to 2 or 3 particular species but not necessary. Just make sure there are a lot of breaks in sight and rock work for them to claim territories.
ill post in a sec, gotta charge my camera, now this is my stock officially
3 yellow labs
3 red zebras
1 large pleco
2 paratilapia bleekeri
3 yellow finned ones
2 melochromis autoras(dont know second name, just yellow with horizontal stripes)
3 giraffe patterned ones
1 melochromis Mainganos i think(the blue ones with horizontal stripes)
2 mbunas with yellow fins, but the yellow is at the bottom instead of the top