10 Great Tank Mates for Swordtail Fish: Compatibility Guide 2026

The Swordtail is a fascinating species that has risen to the high ranks of popular aquarium fish. Perhaps its tail and name are the reasons hobbyists seek out these peaceful community members. Nonetheless, their easy care and breeding make them an excellent choice for beginners. They're also relatively hardy and aren’t fussy eaters. All are welcome traits in this colorful tropical fish.

So, what are some potentially good tank mates for them? Let's find out!

The 10 Great Tank Mates for Swordtail Fish

1. Common Pleco (Pterygoplichthys pardalis)

The Common Pleco is a nocturnal bottom feeder from the deltas of South America. Despite its large size, it's an excellent tank mate for the Swordtail and other community fish because of its peaceful nature. It is content to feed on algae and hide in a cave or similar hiding place during the daylight hours. If enough vegetation isn’t present, it is essential to supplement its diet with plant-based foods.

2. Common Platy (Xiphophorus maculatus)

The Common Platy is closely related to the Swordtail, which gives this fish an edge on the compatibility score. Scientists classify them in the same genus calling this species the one without the sword. Both fish live in Mexico and Central America in the wild. Many of the specimens you find in pet stores are hybrids of the two species. Its population and its status in its native habitat are unknown.

3. Angelfish (Pterophyllum scalare)

The Angelfish is one of the beautiful of aquarium fish. It is elegance on a grand scale. This species will cohabit well with the Swordtail. It is slow-moving and peaceful, considering its larger size. It will get along fine with other compatible tank mates. However, it may eat the fry of the Swordtail and other live-bearing fish. But the Swordtail may devour them, too, if you don’t remove them from the aquarium.

4. Betta (Betta splendens)

The Betta is another showy fish that does well with the Swordtail, as long as the tank is big enough. You should also keep just one male to a tank. It is worth noting that this species isn’t compatible with some of the other compatible tank mates, such as the Angelfish or different long-finned varieties. They are easy pickings for the sometimes-aggressive Betta.

5. Black Molly (Poecilia sphenops)

The Black Molly is another live-bearing species that has a similar, peaceful temperament as the Swordtail. You’ll also find this fish in a variety of other colors, including some fancy ones with long fins. This Central American fish is diurnal and prefers slightly alkaline water. It is an active tank mate that has been a popular pet for decades.

6. Neon Tetra (Paracheirodon axelrodi)

The Neon Tetra is a welcome addition to any community tank, if just for its brilliant colors. They are quite the sight when you get a school of them together because they are so active. This species will do best in a well-planted tank that provides adequate cover and food. It’s worth mentioning that the Neon Tetra is sensitive to poor tank conditions.

7. Madagascar Rainbowfish (Bedotia geayi)

The Madagascar Rainbowfish is another striking fish that is worthy of its name. It does best if kept in schools, given its larger size. Otherwise, it is a peaceful tank mate that will add color to your tank. The International Union for Conservation of Nature and Natural Resources (IUCN)  lists this species as endangered.

8. Harlequin Rasbora (Trigonostigma heteromorpha)

The Harlequin Rasbora brings color and a lively personality to the mix. It is a tolerant fish that can handle less-than-ideal conditions. You should keep this species with others of its kind in small schools. Like other brightly colored fish, you should take advantage of its looks with black gravel as an ideal backdrop to highlight it.

9. Zebra Danio (Brachydanio rerio)

The Zebra Danio hails from Asia in the wild. It’s a popular species in the aquarium trade. It’s another hardy variety that prefers cooler waters. As you may guess, it is a schooling fish that will add a lively touch to your tank. They are nomadic in their native habitat, which adds to their tolerance of varying water conditions.

10. Fancy Guppy (Poecilia reticulata)

The Fancy Guppy is probably one of the most beautiful you can find to live with your Swordtails. It is an excellent beginner fish that is tolerant of tank conditions. The Fancy Guppy is susceptible to fungal diseases. Therefore, it’ll fare best if you add some aquarium salt to your tank when doing maintenance water changes.

What Makes a Good Tank Mate for Swordtail?

A good tank mate for the Swordtail isn’t aggressive or territorial, although males of this variety may chase others of its kind. Other livebearers are suitable choices since they usually require the same water conditions and have similar temperaments. These fish are also quite hardy and will get along with other species that are equally as tolerant.

Where Do Swordtail Prefer to Live in the Aquarium?

Although they are surface feeders, the Swordtail doesn’t have a specific area in the tank in which it will swim; they’ll explore their entire surroundings.

The Swordtail will fare best with some hiding places and plants. You should also keep a hood on your aquarium since they are capable jumpers. Floating plants are an excellent addition for this prolific breeder.

Water Parameters

The Swordtail lives in the inland wetlands of Mexico and into Central America. Its habitat includes a variety of water bodies, including ditches, streams, springs, and ponds. This accounts for the species tolerance of different conditions. It can handle temperatures ranging from 64℉–82℉. Also, the Swordtail prefers a slightly alkaline pH over 7.0.

Size

The Swordtail can reach lengths of up to 5 inches long if given a nutritious diet and enough room to grow. Females can get over 6 inches long. They lack the distinctive sword and have a more rounded body shape than the males. The wild variety is also green. However, you’re more likely to see orange, black, and red ones at your local pet store.

Aggressive Behaviors

Swordtails generally get along with other community fish. Even though they live anywhere in the tank, they won’t chase others. The one exception is a tank with more than one male. You should plan on keeping one male with several females to keep the peace.

Top 4 Benefits of Having Tank Mates for Swordtail in Your Aquarium

1. The Swordtail and Its Tank Mates Are Peaceful Fish

The Swordtail is the quintessential community fish on many scores. Fortunately, its tank mates also fit this bill.

2. The Swordtail and Some of Its Tank Mates Are Live-Bearing Species

The Swordtail is probably one of the easiest fish to breed, making it an excellent learning tool for children. The same applies to its tank mates, such as the Platy and Black Molly.

3. The Care of the Swordtail and Its Tank Mates Is Easy

Researching a fish’s native habitat often provides valuable clues about its care. The Swordtail lives in a broad range of aquatic environments, from still to faster-moving waters.

4. The Swordtail and Its Tank Mates Aren’t Picky Eaters

Most of the Swordtail’s tank mates require easy or moderately easy care. All are excellent choices for beginners. They aren’t fussy about what they eat, either. A high-quality commercial diet will satisfy their needs, with occasional supplementation of blood worms or brine shrimp for variety.

Final Thoughts

It’s easy to understand why the Swordtail is such a popular aquarium fish. Their bold colors make a stunning backdrop for several of their tank mates, creating a showy display in your tank. They are widely available from big-box retailers and come in a broad range of varieties.

With proper care, the Swordtail can live up to 5 years. Fortunately, this fish is a hardy one that is tolerant of most conditions.

Featured Image Credit: slowmotiongli, Shutterstock