(1) Add more Mollies. A group of Mollies with at least three males and at least five females, will usually minimize the aggressiveness of any one overly aggressive Molly.

(2) Get a bigger aquarium. When Mollies are compressed into a smaller living space, it often increases their aggressiveness. Conversely, more living space in a larger aquarium will often reduce the pressure that they put on each other.

(3) Feed a small amount of live food. For example, I feed my Mollies a few Live Black Worms each day. Perhaps the live food makes them feel more satisfied and less aggressive. Click here for more information about Black Worms.

(4) Reduce the temperature down 2 degrees by adjusting your aquarium heater. For example, if the temperature is now 80 degrees F, then reduce it to 78.

Usually the combination of more Mollies, more space, reducing the temperature, and live food will usually reduce the aggressiveness of any one Molly. Good luck with your fish.

Your female Molly is not an egg-layer, and so she does not normally lay eggs. She is a livebearer, and a livebearer female releases babies, that have been inside her body long enough to absorb their eggs-sacks after hatching from eggs inside her body.

What can cause baby Mollies to be released prematurely with egg-sacks? Sometimes if a female Molly is moved, she will prematurely release her babies. Or if a female is netted and handled too roughly, she will prematurely release babies with egg-sacks. In fact if a female Molly is stressed in any way, she may prematurely release her babies, and those babies may have egg-sacks, or sometimes they may still be eggs.

So it is very important not to stress a big female Molly that looks like she will soon have babies. But it's also important to put her in the Net Breeder, or the other fish in the aquarium may eat the babies just after they are born.

To get a female Molly into a Net Breeder without stressing her, it is best to dim the lights and move a catching net very slowly while catching her.

It is very good technique to move the Net Breeder up under the catching net, and transfer the female Molly from the net into the Net Breeder without taking her out of the water. I have often held the catching net in one hand and the Net Breeder in the other hand, then just slowly and gently herded a female into the Net Breeder.

I hope my comments help you.

But you should keep the various types separated in different aquariums, or the lyre tails and pot bellies may have trouble competing with the normal Mollies.

You would expect that they would have trouble competing, because the genes for lyre tails and pot bellies are in the wild fish, but they are rarely seen in the wild Mollies, so we conclude that they have trouble competing with the normal Mollies.

Once you have a group of lyre tail Mollies or Pot Belly Mollies in their own aquarium, they will be very easy to breed. In fact it is difficult to stop them.

We do not offer the plant named "Tropical Marble Queen", which may be a hybrid of two species in the genus named Echinodorus. If that is true, it would be related to the Amazon Sword Plant, Echinodorus bleheri, which we do sell.

Even if you add plants and lots of hiding places for your female Mollies, it is doubtful that they will get along well. The stronger female will make the weaker one miserable, unless you add more mollies.

Mollies live best in a group with a few males and several females. A group with 3 or more males and 5 or more females is good, because the stronger Mollies usually do not make the weaker Mollies miserable.

A group of eight mature Mollies will need an aquarium with at least 25 gallons of water. Click here for more information about Mollies.