My finmate Gary is an Aulonocara freak! He is totally addicted to Peacocks, and Aulonocara "mamalela Lemon Jake" is one of his favorites. It is believed to be a color morph of Aulonocara Jacobfreibergi, and this complex is filled with some of the most sought after strains. Such as A. Jacobfreibergi "Otter Point," "Carolae," "Reginae," "Cape Kaiser," "Hongi Island," to name a few. Their fins are longer and they display them beautifully. It is easy to understand why they are called the "Malawian Butterflies." I like to feed the fry freshly hatched brine shrimp. It is their mainstay from the time they are free swimming to about 3/4 of an inch. Then I start feeding them spirulina sticks, they love picking on them. I continue to keep them on green sticks and flakes throughout adulthood.
I have a breeding group in a 60 gallon flat, with about 20 females and 3 to 4 males. This tank has a bare bottom and I am using sponge filters. There are a couple bundles of PVC at each end, and that is about it. There is definitely a dominate male, but I have observed subdominant males spawning with the females. Although they mostly live in large caves in the wild, I don't feel that it is necessary to duplicate, in order to get them to breed. Often hobbyists provide a layer of sand on the bare bottom tanks, I think it is easier to keep clean without the sand. Lighting is a big debate, all though I don't know how important it is. I have lighting over the tank, however it is only on when we are in the fish house. Some hobbyists do have lights that go on and off at certain times, but I am not that organized.
They get up to about 4-1/2 to 5 inches in length for the males, the females are a bit smaller 3-1/2 to 4". The females remain battleship gray, while the males display bright yellow fins with a blue body. I don't like to mix species unless I am totally out of room. Lately that has been the case, and Gary has had to mix all kinds of Mbuna fry with his Peacock fry. They do okay, but they just can't get enough food when housed with Mbuna. So, I would say only if you have to. The "Lemon Jake" is truly one of the most attractive Peacocks, just keep your water clean, and a diet of green flake and sticks. It will only be a matter of time before nature takes its course.