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Black Molly

Poecilia sphenops

The black molly (Poecilia sphenops) and other mollies thrive when offered brackish water. In a freshwater aquarium, salt should be added to maintain the best condition.

If only a small amount of salt can be used the water should be hardened with calcium carbonate powder for best fish health. Coral sand or marble chip will have the same water hardening benefits for the molly.

These mollies are generally black in colour with a soft velvet like appearance. Colour variations are available though they are often hybridisations between Poecilia sphenops and other molly varieties.

Fin variations such as those of the lyre tail molly were originally produced from the mating of black mollies with sailfin mollies.

Body variations such as the balloon molly are becoming popular, but the fry from such fish are often stillborn due to inbreeding.

As with other mollies, you should feed your black molly on a diet of spirulina or other green food such as blanched spinach and squashed peas. A little protein food will ensure a balanced diet. Tropical pellets or bloodworms are often given to the black molly for this purpose.

Family - Poeciliidae

Size - 8-12 cm

Fish Origin - South America

Water - Add at least 1 teaspoon of salt per 3 litres of medium hard water

Temperature - 22-28°C

Feeding - Green food based diet, mainly algae in natural environment

Sexing - Male molly displays gonopodium and females generally larger

Breeding - The black molly is a livebearer

Aquarium - Keep in a community with other mollies or livebearers

Black Molly Community Aquarium



Black lyre tail mollies and other molly variations live together in a planted aquarium. Java fern and other hard water tolerant species are perfect for such fish tanks.           

Young Black Mollies



Sometimes black molly fry can grow to adult size along side their parent fish. Ensure the aquarium is well planted and feed it's inhabitants regularly. The mollies will grow faster in larger aquariums than these.

Guppy | Platy | Sailfin Molly | Swordtail | Endler's Guppy | Aquarium Fish

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