15 Different Types of Molly Fish – Most Common Molly Types

Imagine a vibrant aquatic canvas, painted with hues ranging from shimmering gold to deep blacks, and dotted with patterns as unique as fingerprints. Welcome to the diverse realm of Molly fish!

Among the aquarium hobbyists, the Molly stands out not just for its playful demeanor but for its astonishing variety. While many might be familiar with the quintessential silver or golden Molly, there’s a vast spectrum that awaits discovery.

From sailfins to balloons, dalmatians to lyretails, the types of Molly fish are as diverse as the stories they carry. This article will guide you through 15 of the most common types of this mesmerizing species, each with its own distinct character and charm. Dive in, as we unravel the world of Molly fish – one type at a time!

Common Black Molly

Common Black Molly

• Experience Level: Beginner
• Max Size: 3 Inches
• Temperament: Peaceful
• Min Tank Size: 30 Gallons
• Water PH: 7.0-7.8
• Aquarium Hardiness: Hardy
• Water Temperature: 68-82 F

Sporting black colored scales, the common black molly is a typically peaceful fish that does well in a community aquarium if it’s offered enough space and a planted aquarium.

If kept in a community aquarium, you should choose size-appropriate tank mates that share the same personality traits as the black molly.

Black mollies are omnivorous (you can feed them algae-based flakes, brine shrimp, freeze-dried bloodworms, etc.), they have a strong appetite, but be careful not to overfeed them.

All mollies enjoy live plants in their aquarium and the black molly is no exception as it likes to graze on plants and algae that grows on plants.

Dalmatian Molly Fish

Dalmatian Molly Fish (source)

• Experience Level: Beginner
• Max Size: 4 ¾ Inches
• Temperament: Generally Peaceful
• Min Tank Size: 30 Gallons
• Water PH: 7.0-7.8
• Aquarium Hardiness: Hardy
• Water Temperature: 68-82 F

Having the same color combination as the Dalmatian dog (black and white), the Dalmatian Molly is an interesting molly strain with beautifully patterned scales.

They grow a bit bigger than the common black molly, averaging a little under 5 inches. They require a large tank with plenty of swimming space, well-oxygenated water, and live plants.

As with other mollies, make sure you set up a heater for your tank and a filter to help keep the water at optimal levels.

Dalmatian Lyretail Molly

Dalmatian Lyretail Molly (source)

• Experience Level: Beginner
• Max Size: 3 Inches
• Temperament: Generally Peaceful
• Min Tank Size: 30 Gallons
• Water PH: 7.0-7.8
• Aquarium Hardiness: Hardy
• Water Temperature: 68-82 F

The Dalmatian Lyretail Molly is a color variation of the Sailfin Molly and has white-black patterned scales that give a marbled effect.

It’s a beginner-friendly molly strain that reaches a maximum size of 3 inches. Its diet is that of an omnivorous fish, feeding on flake, frozen and freeze-dried foods.

As with any live-bearing fish, make sure females outnumber males by 2-3 to one. This molly variety enjoys a planted aquarium and requires good water conditions for optimal health.

Black Sailfin Molly

Black Sailfin Molly Fish

• Experience Level: Beginner
• Max Size: 4 Inches
• Temperament: Peaceful
• Min Tank Size: 30 Gallons
• Water PH: 7.0-8.0
• Aquarium Hardiness: Hardy
• Water Temperature: 68-82 F

Sailfin mollies feature beautifully flowing fins and because of their long fins, they should not be kept with fin-nippers. Therefore, choose tank mates carefully if you want to avoid injuries.

They’re easy to breed and care for, which explains why they’re often recommended for beginners.

That said, however, there are certain keeping requirements that must be met – spacious tank, water parameters in the optimal range, stable water temperature and well oxygenated water.

Keeping live plants in the aquarium as well as setting up a heater and filter will help with these issues.

White / Silver Sailfin Molly

Silver Sailfin Molly (source)

• Experience Level: Beginner
• Max Size: 5 Inches
• Temperament: Peaceful
• Min Tank Size: 30 Gallons
• Water PH: 7.0-8.0
• Aquarium Hardiness: Hardy
• Water Temperature: 68-82 F

An aquarium strain of hybrid mollies, the White or Silver Sailfin Molly has silvery scales and beautifully long fins.

Females of this strain grow larger than the males and are heavier. Males on the other hand are a bit more colorful displaying orange markings in the dorsal region and their bodies as well as turquoise markings on their caudal fins.

Black Lyretail Molly

Black Lyretail Molly

• Experience Level: Beginner
• Max Size: 5 Inches
• Temperament: Peaceful
• Min Tank Size: 30 Gallons
• Water PH: 7.0-8.0
• Aquarium Hardiness: Hardy
• Water Temperature: 68-82 F

A hybrid variation of the Sailfin Molly, the Black Lyretail Molly has black scales with white highlights on its fins and lyre-shaped caudal fins.

It’s a community-friendly fish because of its peaceful nature and should be housed together with fish that are similar in size and can withstand the same water conditions.

Because of their high appetites and resulting waste production, a good filter system is a must for these fish.

Gold Dust Molly

Gold Dust Molly Fish (source)

• Experience Level: Beginner
• Max Size: 5 Inches
• Temperament: Peaceful
• Min Tank Size: 30 Gallons
• Water PH: 7.0-8.0
• Aquarium Hardiness: Hardy
• Water Temperature: 68-82 F

The Gold Dust Molly is an excellent alternative for those that like the Black Molly but would prefer having a bit more color in their aquarium.

It’s a short-finned variety with an interesting color scheme of dusty gold and black. Males of this variety are slenderer, females are fuller and develop a pregnancy spot.

A planted aquarium is ideal for this fish that enjoys a diet that should include algae-based flakes, brine shrimp, and freeze-dried bloodworms.

Balloon Belly Molly Fish

Balloon Belly Molly Fish

• Experience Level: Beginner
• Max Size: 3 Inches
• Temperament: Peaceful
• Min Tank Size: 30 Gallons
• Water PH: 7.0-7.8
• Aquarium Hardiness: Hardy
• Water Temperature: 68-82 F

Named after their balloon-shaped bodies (arched back and rounded belly), Balloon mollies should be housed with fish that have similar temperaments.

They’re available in yellow, white and black color combinations and feature a lyre-shaped caudal fin.

They require both meaty foods and algae and should be housed in a thickly planted aquarium.

Marble Lyretail Molly

Marble Lyretail Molly

• Experience Level: Beginner
• Max Size: 5 Inches
• Temperament: Peaceful
• Min Tank Size: 30 Gallons
• Water PH: 7.0-8.0
• Aquarium Hardiness: Hardy
• Water Temperature: 68-82 F

This beautiful black and white fish is a variation of the Lyretail Molly. To make sure the tall dorsal fin of the male molly develops normally, plenty of swimming space should be provided.

For optimum health, a minimum amount of one teaspoon per gallon of water should be provided. Because of the salt, it should only be housed with other fish that tolerate salt in their water.

Gold Doubloon Molly

• Experience Level: Beginner
• Max Size: 5 Inches
• Temperament: Peaceful
• Min Tank Size: 30 Gallons
• Water PH: 7.0-8.0
• Aquarium Hardiness: Hardy
• Water Temperature: 68-82 F

This is a short-finned molly variety that’s a good alternative to the Harlequin Sailfin Molly that impresses with its dorsal flair.

Its black and gold color scheme creates a beautiful contrast and makes for an interesting addition to a community tank.

Like most mollies, this variety too requires plenty of space, live plants, and a mixed diet high in vegetable matter.  

Harlequin Sailfin Molly

Harlequin Sailfin Molly (source)

• Experience Level: Beginner
• Max Size: 6 Inches
• Temperament: Peaceful
• Min Tank Size: 30 Gallons
• Water PH: 7.0-8.0
• Aquarium Hardiness: Hardy
• Water Temperature: 68-82 F

The body of Harlequin Sailfin Mollies is speckled with gold, white and black patches. Besides their dazzling colors that make them stand out, their temperament is also suited for community aquarium housing.

They grow a tad bit bigger than the average molly fish and feeds on a variety of foods. If not fed properly, they won’t hesitate grazing on live aquarium plants.

Platinum Lyretail Molly

Platinum Lyretail Molly

• Experience Level: Beginner
• Max Size: 5 Inches
• Temperament: Peaceful
• Min Tank Size: 30 Gallons
• Water PH: 7.5-8.5
• Aquarium Hardiness: Hardy
• Water Temperature: 75-82 F

This hybrid of the Lyretail Molly features a platinum/gold body and tall dorsal fins that will only develop beautifully if enough space is provided in the aquarium.

They do well in both saltwater and freshwater aquariums. If housed in freshwater aquariums, one teaspoon of salt per gallon is recommended for optimum health.

Golden Sailfin Molly

Golden Sailfin Molly (source)

The Golden Sailfin Molly is best suited for community aquariums with hard water. They grow a bit larger compared to the average molly and require an aquarium with plenty of space.

• Experience Level: Beginner
• Max Size: 6 Inches
• Temperament: Peaceful
• Min Tank Size: 30 Gallons
• Water PH: 7.0-8.0
• Aquarium Hardiness: Hardy
• Water Temperature: 68-82 F

They prefer a heavily planted aquarium, which can allow them to munch on soft algae that grows on these plants.

Golden sailfin mollies are classified as omnivores; however, their diet should be rich in plant material, which you can achieve by feeding them algae wafers as part of their diet.

Creamsicle Sailfin Lyretail Molly

Creamsicle Sailfin Lyretail Molly (source)

The Creamsicle Molly, known for its radiant orange hue and distinct lyretail fins, is a hybrid descendant of the Sailfin Molly and Shortfin Molly. Its vibrant appearance coupled with its peaceful demeanor makes it a favored pick for community tanks with other tranquil fish varieties.

• Experience Level: Beginner
• Max Size: 3-4 Inches
• Temperament: Peaceful
• Min Tank Size: 20 Gallons
• Water PH: 7.5-8.5
• Aquarium Hardiness: Hardy
• Water Temperature: 75-82 °F

These mollies have an inclination for slightly alkaline to neutral waters. Consistent water quality and routine changes are key to ensuring their well-being. As a notable trait, Creamsicle Mollys can thrive in both freshwater and mildly brackish water, providing flexibility for aquarium setups.

Dietarily, they’re omnivores. While they appreciate a mix of flakes, pellets, and occasional treats like bloodworms and brine shrimp, they should also be given vegetable matter, such as algae wafers and blanched veggies.

Their livebearer nature, giving birth to live fry rather than laying eggs, adds another layer of interest for hobbyists. With their easy-going nature, stunning coloration, and adaptability, the Creamsicle Molly is a delightful addition to any community aquarium.

Red Sunset Molly Fish

Red Sunset Molly Fish

Sunset Red Sailfin Mollies belong to the genus Poecilia, sharing this distinction with guppies and platys. Originating from Central America and the southern United States, these fish are available in both shortfin and sailfin varieties. Mollies, with their vibrant colors and patterns, are a captivating sight in aquarium setups.

• Experience Level: Intermediate
• Max Size: Smaller 2.5-3 inches
• Temperament: Peaceful
• Min Tank Size: 20-gallon minimum
• Water PH: 7.0-8.0
• Aquarium Hardiness: Moderate
• Water Temperature: Warm 75-82 °F
• dH: 20-30

Shortfin mollies exhibit a greenish-silver hue, adorned with brown and yellow patterns and distinctive black spots. Their preference lies in warm aquatic settings, reminiscent of their natural habitat in warm springs and ponds surrounded by vegetation. While their diet is primarily plant-based, they are not strictly herbivores.

The sailfin variant is particularly striking due to its large dorsal fin, which can rival the size of the fish itself. This fin not only determines mating prospects but also dictates hierarchy among other mollies. A light grey in color, sailfin mollies can exhibit a greenish-blue tint during breeding periods, with spot patterns that sometimes resemble stripes. The black molly is a particularly sought-after species within this group. Algae and other plant matter form the staple of their diet, supplemented occasionally by mosquito larvae.

Wild Molly Fish

Wild Molly Fish / Poecilia Sphenops (source)

Recognized as the molly, Poecilia sphenops can also be referred to as the short-finned molly or common molly. Their natural habitats encompass freshwater streams and coastal brackish and marine waters ranging from Mexico to Colombia. In the wild, their appearance is predominantly a dull, silvery shade.

• Experience Level: Intermediate
• Max Size (Male): 3.2 Inches
• Max Size (Female): 4.8 Inches
• Temperament: Mildly Aggressive
• Min Tank Size: 20 Gallons
• Water PH: 7.0-8.0
• Aquarium Hardiness: Moderate
• Water Temperature: 72-78°F

Hybridization with various Poecilia species, especially the sailfin molly, is commonplace. The male mollies have a mildly aggressive disposition, making them one of the foremost choices as feeder fish. Their prominence in this role is credited to their swift growth trajectory, considerable birth size, and prolific reproduction and brood numbers.

In terms of physical characteristics, mollies share similarities with other livebearers like platies, swordtails, and guppies. They have an edge in size and are more animated in their movements. Many aquarium hobbyists note that, in contrast to the more placid platies, mollies showcase pronounced individual traits and a heightened level of aggression.

Choosing wild mollies offers aquarists an opportunity to introduce a slice of the aquatic wild into their domestic setups.

Questions and Answers Related to Types of Molly Fish

Here are some interesting questions and answers that are related to types of molly fish, that will help you learn what are the similarities and differences between different molly varieties:

What distinct features set the Common Black Molly apart from the Dalmatian Molly Fish, given that both have a predominantly dark appearance?

While both may appear dark, the Common Black Molly is typically a solid black color without any other markings. The Dalmatian Molly, on the other hand, features a black-and-white spotted pattern resembling that of a Dalmatian dog.

How do the fin structures of the Dalmatian Lyretail Molly differ from the Black Sailfin Molly, considering that they both belong to the lyretail and sailfin subcategories respectively?

The Dalmatian Lyretail Molly has an elongated lyre-shaped tail. The Black Sailfin Molly possesses a sail-like dorsal fin, which is typically large and stands tall, especially in males.

In terms of color variations and patterns, how does the White / Silver Sailfin Molly contrast with the Gold Dust Molly, even though both exhibit a shiny appearance?

The White/Silver Sailfin Molly has a shiny white or silvery appearance with a prominent sailfin. The Gold Dust Molly features a golden yellow color with specks or “dust” of black scattered throughout its body.

How is the body shape of the Balloon Belly Molly Fish unique, despite its similarity in coloration to many other molly types?

The Balloon Belly Molly variety is characterized by its rounded, balloon-like belly. While its coloration may resemble other mollies, its distinct body shape makes it unique.

What are the characteristic markings of the Marble Lyretail Molly that distinguish it from the Black Lyretail Molly, given that they are both from the lyretail subgroup?

The Marble Lyretail Molly has a combination of black and white marbled patterns. The Black Lyretail Molly is primarily solid black but with the lyretail fin shape.

Among the varieties, how does the Gold Doubloon Molly’s appearance differentiate itself from the Golden Sailfin Molly, when both have a gold-themed name?

The Gold Doubloon Molly has a deep gold color throughout its body. The Golden Sailfin Molly is characterized by its bright golden color but also features the large sail-like dorsal fin.

What coloration differences exist between the Harlequin Sailfin Molly and the Platinum Lyretail Molly, despite both having a metallic-themed name?

Harlequin Sailfin Molly has a mix of colors, often a metallic appearance with patches of other colors. The Platinum Lyretail Molly, on the other hand, is characterized by its bright, metallic silver color, with the distinct lyretail shape.

How does the Creamsicle Sailfin Lyretail Molly’s coloration stand out among the molly types, considering its unique name suggesting a mix of colors?

This variety has a mix of orange and white, reminiscent of a creamsicle ice cream treat. The name suggests its unique coloration among molly types.

In terms of habitat preference, how might the Wild Molly Fish’s requirements vary from the Red Sunset Molly Fish, given that the former is closer to its natural ancestral form?

Wild Molly Fish would likely prefer conditions closer to their natural habitats – slightly brackish water with vegetation. They might be more tolerant of varied conditions compared to selectively bred varieties like the Red Sunset Molly. The Red Sunset Molly might have specific requirements regarding water quality, pH, and temperature.

What similarities in fin structures might one observe between the Golden Sailfin Molly and the Black Sailfin Molly, even though their primary colorations are drastically different?

Even though their colorations differ, both varieties have the distinct sail-like dorsal fin, especially pronounced in males. The structure of the fin would be similar in both varieties, showcasing the “sailfin” characteristic.

Conclusion

When it comes to molly fish there’s certainly enough variety to work with. Some mollies can get accustomed to salt water, others require a bit of salt for optimum health.

Most molly fish are peaceful, and you should take their specific requirements into consideration when housing them with other fish, especially when it comes to fin-nippers as a lot of molly varieties have long fins.

They also require enough tank space to swim and develop all their beautiful markings and fins.

I hope some of the molly fish varieties I discussed in this article have caught your attention and you’re ready to set up the perfect aquarium for them.