hi, can anyone tell me how to identify a pregnant black mollies? does she haev a gravit spot just like other livebearers? i have been observing her gravit spot but i dont' see anything coz she is all black. But her belly is big and rounded.(is she pregnant) i used to have 6 black mollies, i guess there were 3males and 3 females, 3 of the black mollies died last week and now i only left with 3 but i don't know whether they r male or female.. (HELP!!!!!)