Anisa is the original Genie pony, her origins are unknown, even to her, one day a pony rubbed her lamp and that is her first memory of existence, it is said she was created by only the strongest magic, or perhaps she is of changeling decent, as genies can alter their appearance to attract a mate, but the truth may never be known.
Anisa wonders the nature and finds either broken glass or an pieces of metal or precious gems and puts it in her lamp and incubates it as it grows into a lamp or bottle and an tiny tiny fetus grows inside-- the new genie. (Special thanks to Storm-The-BUN
for this idea) This is a power, so far, that only Anisa holds, other genies re-produce like any other pony. Anisa can also reproduce like other ponies.
The life cycle of a Genie is simple, within a few months of incubation, the new genie is formed, and then only 2-3 days after that they are a full-grown filly or colt. They age to a young adult rapidly, and then their aging slows and they live for hundreds of thousands of years, their true lifespan is unknown, and they could be immortal, as far as dying of old age goes.
Dangers to a genie's life are very scarce, as aging isn't a problem. The major danger is their lamp or bottle breaking. Their lamp/bottle contains their magic, their life force. If their Lamp/Bottle breaks, the genie dies. This is why bottles are more rare than lamps, Anisa thinks of all genies as her child, and glass is a lot easier to break than the other materials. She doesn't often put that burden on her children. When a genie is young, she will often keep close watch on them, and protects them from even themselves.