Original sentence: A few other genera from Poeciliidae are kept by advanced aquarists, including Brachyrhaphis, Heterandria, and Limia.Commonly, the problems include providing the right diet and conditions to trigger mating, and ensuring that the female does not miscarry the developing embryos too soon.None of these are considered to be easy aquarium fish, and some present as much of a challenge to the aquarist as egg-laying fish.Other livebearing species kept by aquarists, though far less commonly than the Poeciliidae are the splitfins, family Goodeidae; and the halfbeaks, family Hemirhamphidae; Freshwater stingrays of the family Potamotrygonidae are sometimes kept by advanced aquarists, and these are also livebearers
Edited sentence: Because the newborn fish are large compared to the fry of oviparous fish, they are easier to feed than the fry of egg-laying species such as characins and cichlids.In addition, being much larger makes them far less vulnerable to predation, and with sufficient cover, they can sometimes mature in a community tank.Live-bearing aquarium fish, often simply called livebearers, are fish that retain the eggs inside the body and give birth to live, free-swimming young.This makes them much easier to raise, and for this reason, aquarists often recommend them for beginners to fish breeding