It is a small member of the Poeciliidae family ( females 4 â `` 6 centimetres ( 1.6 â `` 2.4 in ) long , males 2.5 â `` 3.5 centimetres ( 1.0 â `` 1.4 in ) long ) and like all other members of the family , is live-bearing . It is a small member of the Poeciliidae family ( females 4 - long , males 2.5 - long ) and like all other members of the family , is live-bearing .