Molly Fish General Information

sailfin molly fishMolly Fish

Molly (Poecilia Sphenops) originates from Argentina, Brazil, Africa, the U. S. Virgin Islands and Venezuela. Robert John Lechmere Guppy discovered Mollies in 1866. Mollies don’t lay eggs they give birth to living young.

Molly fish are some of the most popular aquarium fish and most aquarium hobbyists have at one time at least had one of these attractive and gentle life bearers in their fish tanks.

Mollies are tropical fish which are considered the best variety of fish for breeding in aquarium. They are both salt water and fresh water fish thriving best in the mixture of the above or in normal salty water.  Adult mollies are usually between 2-4 inches(5 – 10 cm) long and they live around 3-5 years. Water pH should be around 7.5 – 8.5 and temperature 70°F – 82°F (21°C – 28°C).

They are commonly found in slow-moving streams, ponds, and marshes, as well as in areas with heavy vegetation.

In their natural habitat, molly fish can be found in a variety of water conditions, including hard or soft water, and with a pH ranging from slightly acidic to slightly alkaline. They are adaptable fish that can tolerate a wide range of temperatures, although they do best in water that is between 78 and 82 degrees Fahrenheit.

Molly fish are omnivorous and feed on a variety of plant and animal matter in the wild. They are known to feed on algae, small invertebrates, and detritus.

In their natural habitat, molly fish can be found in a variety of colors, including silver, black, gold, and various shades of green and brown. They are also known for their long, flowing fins and tails, which are a popular feature in the aquarium trade.


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