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Fish Supplies/
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Freshwater Fish/
Swordtails

Swordtails

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Marigold Wag Swordtail
(1) reviews
$5.99
Sanshoku Koi Swordtail
(1) reviews
$12.49
Red Swordtail
(6) reviews
$4.99
Assorted Swordtails
(1) reviews
$4.99

In Store Only! Petco Perks. Earn $20 Petco Cash when you spend $100+. Activate Now. Ends 10/31/26. Terms Apply.

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Terms $50: From 10/16-10/31/26, Petco Perks members can earn promotional bonus points in-store at Petco or Unleashed by Petco: earn 10,000 points ($10 Petco Cash) when you spend $50–$99.99. Must activate offer to use in store. Limit one offer per customer. Qualifying spend is calculated on the subtotal before taxes, discounts, and shipping and must be spent in a single transaction. Pet services, gift cards, donations, membership fees, taxes, and shipping are excluded. Bonus points load to accounts on 11/1/26 and must be used by 11/14/26.
Terms $100: From 10/16-10/31/26, Petco Perks members can earn promotional bonus points in-store at Petco or Unleashed by Petco: earn 20,000 points ($20 Petco Cash) when you spend $100+. Must activate offer to use in store. Limit one offer per customer. Qualifying spend is calculated on the subtotal before taxes, discounts, and shipping. Pet services, gift cards, donations, membership fees, taxes, and shipping are excluded and must be spent in a single transaction. Bonus points load to accounts on 11/1/26 and must be used by 11/14/26.
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Pineapple Swordtail
(4) reviews
$5.99
Kohaku Swordtail
(4) reviews
$8.49
Red Lyretail Swordtail
(1) reviews
$5.99
Twinbar Solar Flare Swordtail
(2) reviews
$6.49

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Petco Freshwater Fish Swordtails Fish Supplies Freshwater Fish Aquatic Life for Sale Saltwater Fish Tetras Petco Freshwater Fish Aquatic Life for Sale GloFish Freshwater Fish Petco Freshwater Fish Freshwater Fish Imagitarium Freshwater Fish

Frequently Asked Questions

: Swordtails get their name from the males who have an extended lower tail fin that looks like a sword coming from their tail. Females do not have this extension.

: Swordtails are community fish that can be housed with other peaceful, community species. They can also be housed with other swordtails and do best in groups of three or more.

: These active fish that do best in small groups should be housed in a 20 gallon or larger tank to be suitable for their adult size.

Related Articles & Questions

Care Sheets
Beginner's Swordtail Fish Care: Tank, Food, & Compatibility Guide
Learn how to care for Swordtail fish, recommended diet & aquarium setup. Find the right food, supplies & equipment at your neighborhood Petco.
Updated on April 9th, 2026
Care Sheets
Beginner's Guide: Freshwater Livebearer Tank Setup, Food & Happy Fish
Learn how to care for freshwater livebearers, recommended diet & aquarium setup. Find the right food, supplies & equipment at your neighborhood Petco.
Updated on April 9th, 2026
Care Sheets
Freshwater Semi-Aggressive Fish: Top Secrets for a Thriving Tank
Learn how to care for semi-aggressive fish, recommended diet & aquarium setup. Find the right food, supplies & equipment at your neighborhood Petco.
Updated on April 9th, 2026
Care Sheets
Master Amazon Sword Care: Grow Stunning Aquatic Plants in Your Tank
Looking to learn about the Amazon Sword plant? Petco has you covered! Visit Petco to learn all about this popular aquarium plant.
Updated on October 23rd, 2025
Care Sheets
Killifish Care Guide: Unlock Vibrant Health for Your Aquarium Fish
Learn more about Killifish and their care to see if they are the right aquatic life to begin or add to your aquarium.
Updated on April 9th, 2026
Vet Q & A
My swordtail has clamped fins, rubbing, no white spots. Is it Ich?
Maintain water temperature at 86F for at least two weeks. Add an air stone during this time to increase aeration/oxygenation. Monitor the other fish for similar symptoms or stress associated with the warmer water. Up to 2 teaspoons of plain aquarium salt (NOT table) can be used to treat ich (white spot disease). It can take a couple weeks to effectively treat ich. In the future, it is recommended to quarantine new fish prior to adding them to the main tank to prevent infection.
Updated on September 24th, 2025
Food & Nutrition
What fish and supplies are best for a beginner's small tank?
Without anything to use for scale, it is hard for me to tell how big your tank is, but in general it seems very small. Also, the water that is in the tank appears very cloudy right now, so that would be the first place to start. Water quality is very important, and will make or break your ability to house and care for fish. I would recommend getting a good filter system (you can visit a local pet store to assist you with brands in your area, as I am not familiar with what you can get in India). Be sure to bring the measurements (height, length, width) of your tank, or the gallons or liters so they can tell you what capacity of filter you will need. Everything else will depend on what types of fish you get - if you plan on getting multiple fish, they will need to be small - a general rule of thumb is one square inch of fish per gallon of water. Depending on the species you get, you may need to also get a bubbler to ensure there is enough oxygen in the water for them, and you will also likely need to get some sort of substrate for the bottom and cage furniture (different species have different air requirements, and some are secretive and like to hide). You may also need a water heater, depending on the species you would like to house. But, depending on how small your tank is, it may be hard to get a water heater that will fit. The food type will also depend on what species you get, as there can be differences in diet type between species. I hope that gives you a place to start, and good luck!
Updated on September 24th, 2025
Vet Q & A
Why are my angelfish and red tail shark sick in their new tank?
Check the water chemistry and temperature. Use a home test kit or submit a water sample to test fro elevated ammonia or nitrite levels. Most pet stores will do this for free or for a small fee. Partial water changes can be done, if indicated, to stabilize chemistry and improve or maintain water quality. Ideally, you want 0 ppm ammonia and nitrites with nitrates at 20 ppm or less in a non-planted tank or 40 ppm or less in a planted tank. Use only aged or conditioned water that is temperature matched to prevent stress or shock. You'll need to keep the temp at the upper limits for Red Tails in order to keep the Angelfish comfortable. That would be in the 78F to 80 F range. Both have similar pH requirements, 6.8 to 7.5. You can fast the Angel for 2-3 days then feed bits of cooked, shelled green peas. This will usually resolve constipation and bloating. Pristine water quality may resolve the patch on your shark. Recommending a medication without more information or a clear image would be risky to the stability of the tank's nitrogen cycle. You can use plain aquarium salt (NOT table or Epsom salt) as a general tonic. It will reduce stress, improve gill function, may treat minor infection and aid in recovery. Dissolve 1 tablespoon per 5 gallons of water in a cup of tank water and gently pour it into the tank. Treat for 10-14 days then reassess the condition. A note on tank size: Although the two fish may be fine in a 15 gallon tank now, you will likely need a larger tank as they mature. Red Tails can reach 6-7 inches and Angels can reach 6-8 inches. At adult size, a 15 gallon tank will be insufficient and could lead to some aggression from either fish.
Updated on September 24th, 2025
Vet Q & A
First fish tank: What Tetras and supplies for my 12-inch tank?
Before you buy any fish, you will need to set up the tank. A basic set up includes: a tank, filter, hood/light, heater, gravel and some decor. The tank should run without fish for at least 4 to 6 weeks. This gives it time to cycle. The Nitrogen Cycle is critical to the health of the tank and any fish you will be keeping. During this time, beneficial bacterial will populate the filter and substrate (gravel). These bacteria will be responsible for breaking down fish wastes and other wastes (uneaten food, dead plants, etc.). You will need a home test kit to monitor water chemistry (ammonia, nitrites, nitrates, pH) or you will have to submit water samples for testing. Most pet stores will do this for free or for a small fee. At first, you will see high levels of ammonia and nitrites. Over time, as bacteria grow, these levels will drop. When ammonia and nitrites are at 0 ppm and nitrates are below 20 ppm, you can consider adding fish. Regular (every 1 or 2 weeks) partial water changes as well as filter changes will be needed to maintain stable water chemistry and adequate water quality. The size of your tank will determine what fish and how many you will be able to keep. Most Tetras do best in groups, so a 12 inch tank may not be large enough. There are several article in the Petco Pet Education Center, formerly Petcoach Library that will provide more detailed information. Click on "Educational Center" at the top of the page, then scroll down to "Articles" and click. Use the Search Bar to find articles regarding aquarium set up and fish keeping.
Updated on September 24th, 2025
Health & Wellness
Just got a small fish. What breed is it and how do I care for it?
Thanks for reaching out about you fish. It is believed to be a Comet goldfish. Water quality and nutrition is the key to success. Testing water parameter for pH, ammonia, nitrite and nitrate will give you guidance for a healthy environment. Purchased food should be rotated out every 3 months as vitamin C and other nutrients degrade over time. Trying to maintain water temperature can be challenging with out a heater, but most fresh water fish tolerate some changes. Good luck.
Updated on September 24th, 2025

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