Don't understand the question, what is meant by stages? What do you consider a stage?
There are many different types of fish. A "painted" Molly fish, refers to any Molly fish that has been dyed to appear as "painted" with markings.
They should be fully grown by 4 to 6 months if they have been reared correctly.
Yes, a molly is a fish.
A molly fish can produce over a hundred fry in a month
Mollys can breed with any other type of molly fish
Molly fish do not lay eggs. They are livebearers and give birth to fry fish. If there are eggs in an aquarium with Molly fish, then they belong to another fish.
it' has no life cycle
Yes, molly fish do have gills.
no i have black molly if you have guppes thay will go with it and otherr fish
It seems so as my Molly flirts with them but ignores the female guppies
No
They dont always die and its probaly because of stress of two many fish, not enough hiding spots, or other fish or diseases. By the way sorry about your dead molly. Hope this saves some fish' lifes.