Can Shrimp Live With Swordtails? What to Know Before You Mix Them

You've got a swordtail tank running, or you're planning one, and you're wondering if a group of cherry shrimp could move in to graze algae and tidy up leftovers. It's a reasonable idea, and the short version is a cautious yes for adult shrimp and a firm no for a breeding colony. Adults can share the tank and live for a long time if the setup is right. The babies, though, vanish about as fast as they're born.

Swordtails are worth singling out from the rest of the livebearers because they're the biggest of the common ones. A platy or a guppy is a modest fish. A full-grown swordtail is a fast, muscular mid-water swimmer that can be twice the length of a platy, and that size changes the math on what it can swallow. So the question isn't really whether shrimp survive swordtails. It's what you want from the shrimp, and whether your tank gives them anywhere to hide.

Dense planting is the single biggest factor in whether shrimp make it alongside active fish like swordtails. An open tank with no cover is where shrimp disappear

Quick Answer

Yes, adult cherry shrimp can live with swordtails, with two caveats. First, swordtails are omnivores that eat whatever fits in their mouths, so baby shrimp get picked off and you won't grow a colony. Second, a swordtail is big, roughly four to five inches depending on the source, against a cherry shrimp's one inch, so even adults need heavy cover to feel safe.

Water is the easy part. Swordtails and Neocaridina shrimp (cherries, blue dreams, yellows) both like hard, slightly alkaline water, so their needs overlap well around a pH of 7.5 to 8.0 and a temperature near 76F. Swordtails do fine in pure freshwater, so unlike mollies you don't have a salt conflict to work around. Bigger shrimp like amanos handle swordtails far better than tiny cherries, and a tight lid matters because swordtails are strong jumpers.

Why Swordtails Are a Bigger Risk Than Platies or Guppies

Across the livebearer family the story is similar: peaceful toward other fish, hungry toward anything small enough to eat. Swordtails fit that pattern, but size and behavior push them up the risk scale compared with their smaller cousins. They're active, confident fish that cruise the middle of the tank, exactly where shrimp have to cross open water to reach food. Guidarium's compatibility guide notes that both species use that middle zone, so they compete for space, and it rates the pairing as possible only with caution. A shy platy near the surface leaves the shrimp more of the tank to themselves; a swordtail patrols it.

Males also have a temperament quirk platies mostly lack. They can be semi-aggressive with each other and will chase or spar, and care profiles such as Tankflare's note they may nip at long-finned tankmates. That restlessness rarely targets shrimp directly, but a tank of darting, squabbling fish is a stressful place for a prey animal, and stressed shrimp hide instead of grazing. Keeping two or three females per male spreads the male energy out and calms the tank.

Size Is the Whole Problem

Here's the part that matters most, and it's also the part the sources argue about. Swordtails are hard to pin to a single number because the sword itself adds length and because keepers measure differently.

FishBase lists the green swordtail at a maximum of 14 cm (about 5.5 inches) total length for males and 16 cm (6.3 inches) for females. Aquarium care profiles quote smaller everyday sizes: Shrimpy Business puts them at up to about 5 inches, and Tankflare gives males 4 to 5 inches including the sword with females a little shorter. The sources also disagree on which sex is larger, though most put the female at the bigger body with the male's length padded out by the sword.

The useful takeaway cuts through the argument. A typical home swordtail lands somewhere around 4 to 5 inches, the maximum runs past 6, and even the low end of those ranges dwarfs the animals you're trying to protect.

That gap is the entire reason adults sometimes make it while babies never do. A full-grown cherry shrimp is near the upper limit of what a big swordtail will bother chasing, so in heavy cover most adults slip by. A shrimplet the size of a comma is a free snack, and a swordtail cruising the plants finds plenty of them.

Water Parameters: Where They Actually Agree

This is the good news, and it's the reason the pairing is even worth discussing. A lot of fish and shrimp combinations fail on water chemistry alone, because one side wants soft acidic water and the other wants hard alkaline. Swordtails and Neocaridina shrimp both want hard, alkaline water, so you can hold both at the same numbers.

Swordtail parameters here are drawn from care profiles at Tankflare, Aquarium Breeder, and FishProfiles; the shrimp ranges are the standard Neocaridina figures echoed by The Shrimp Farm and Buce Plant. The temperature overlap is real but narrow. Swordtails are comfortable a touch warmer than shrimp like to be, and cherry shrimp held at the warm end of their range burn through their lifespan faster and molt more often. Settle on about 76F and you sit inside both comfort zones. For the full breakdown of what shrimp want on their own, our shrimp water parameters guide covers each number.

One line in the sand for Caridina keepers: this overlap only works for Neocaridina. Caridina shrimp like crystal reds and blue bolts want soft, acidic water with a pH below 7, which is the reverse of what a swordtail wants. Don't pair swordtails with Caridina. The chemistry mismatch alone will grind one species or the other down.

The Salt Question (One Less Problem Than Mollies)

If you've read our guide on whether shrimp can live with mollies, you'll remember salt was the sticking point there. Mollies are often kept with a little aquarium salt or even in brackish water, and salt at those levels harms shrimp. Swordtails make life easier. They're freshwater fish that do well in plain hard water, and the common care guides don't call for salt to keep them healthy.

A few older livebearer profiles mention that a pinch of salt does swordtails no harm, but none treat it as a requirement. So with shrimp in the tank, just skip it. Run the water as pure hard freshwater, hold your GH up with a remineralizer, and both animals get what they need. That's one fewer trap than the molly pairing hands you.

The warning that does carry over is copper. Many fish medications contain copper, and copper kills shrimp even in trace amounts, so treat a sick swordtail in a hospital tank rather than dosing the display.

Which Shrimp Handle Swordtails Best

Not every shrimp faces the same odds, and size is the deciding factor again. The bigger the shrimp, the better it copes.

Amano shrimp are the safest pick by a wide margin. At close to 2 inches they're too large for most swordtails to eat, and they're strong algae grazers, which is usually the job you wanted a cleanup crew for anyway. The trade-off is that amanos don't breed in freshwater, so there are no shrimplets to lose in the first place. If what you want is a working cleanup crew rather than a growing population, amanos with swordtails is the combination that causes the fewest headaches. Our amano shrimp care guide covers their needs, and they line up neatly with swordtail water.

Ghost shrimp sit in the middle. Full-grown adults handle swordtails about as well as amanos, and they're cheap enough that losing one now and then doesn't sting. Cherry shrimp and the other Neocaridina colors are the ones people ask about most, and they're the trickiest: adults get by in a well-planted tank, but you're keeping ornaments, not building a colony. Every shrimplet that hatches is a target for a fish already patrolling the plants.

Will Swordtails Eat Baby Shrimp?

Yes, and this is the line that decides everything. You will not raise a shrimp colony in a swordtail tank.

Here the sources are honest about some disagreement, and it's worth repeating rather than smoothing over. Swordtails are known to eat their own newborn fry, so they'll certainly take a shrimplet when they find one. At the same time, a few breeders on hobby forums judge swordtails to be mediocre hunters of tiny young, and report that in tanks packed with fine-leaved plants some females more or less ignore the fry around them. Guidarium's guide is blunter, tagging cherry shrimp as bite-sized prey and swordtails as fry predators.

Put those together and you get a realistic picture. A swordtail isn't a laser-guided shrimp hunter the way a pea puffer is, but it's big, always hungry, and always cruising. In a sparse tank the babies are gone within days. In a jungle of moss and stems, a handful might slip through and grow up, but that's the exception, not a breeding plan. If your goal is a colony that fills the tank over a year, the only reliable route is a dedicated shrimp tank with no fish, and our breeding cherry shrimp guide walks through setting one up.

How to Give Shrimp the Best Odds

If you've decided to try it, a handful of setup choices swing the outcome a lot. With a fish this big and active, none of them are optional.

Plant it heavily before the shrimp go in. Dense plants, moss, and hardscape are the whole game. Shrimp survive by staying out of open water, so give them a tangle to live in. Java moss, a wall of stems, and some driftwood build the cover where shrimp graze and shrimplets hide. A bare tank with one plastic plant is a buffet. If you're starting the planting from scratch, a search for aquarium moss and stem plants turns up the fast-growing species shrimp lean on most.

Establish the shrimp first. Put the shrimp into a mature, planted tank and let them settle and start grazing before the swordtails arrive. Dropping shrimp into a tank where confident swordtails already own the space tends to end badly. That order holds for any fish and shrimp mix, as our best tank mates for cherry shrimp guide lays out.

Go bigger than the swordtails alone need. Swordtails are active and they grow, so a 20 gallon is a sensible floor and more is better. Guidarium recommends at least 35 gallons for the shrimp-and-swordtail pairing specifically. A larger footprint means more biofilm for the shrimp to graze and more room for them to keep their distance from the fish.

Put a tight lid on it. Swordtails are accomplished jumpers, and keepers routinely find them dried out on the floor after slipping through small gaps. A glass or mesh lid is not optional with these fish.

Keep the swordtails well fed. A fish grazing on quality food and the odd piece of blanched vegetable has less reason to hunt down a shrimp. It won't stop the behavior, but a fed fish is a lazier hunter than a hungry one.

Add more shrimp than feels necessary, and match your water. Start with 15 or 20 rather than a handful, because losses are part of the deal and a bigger group behaves more boldly. Use a remineralizer to hold GH steady and keep temperature near 76F. You can check your numbers with an API Freshwater Master Test Kit, which covers ammonia, nitrite, nitrate, and pH in one box. Stable water keeps molts clean, and a shrimp with a soft new shell right after molting is at its most vulnerable to a curious swordtail.

Frequently Asked Questions

◆Will swordtails eat adult cherry shrimp?

Sometimes. A big swordtail can fit a full-grown cherry shrimp in its mouth, so a hungry or bold one will try. In a heavily planted tank with well-fed fish, most adult shrimp survive, but expect to lose a few, especially freshly molted shrimp with soft shells. Amano shrimp, at close to 2 inches, are usually too large to be eaten.

◆Can baby shrimp survive with swordtails?

Almost never. Shrimplets are only a couple of millimeters long, and swordtails patrol the plants where the babies hide. Even in dense moss the vast majority get eaten within days. If you want shrimplets to grow up, raise them in a separate tank with no fish and move adults into the community later.

◆Do swordtails and shrimp need the same water?

Mostly yes, which is what makes the pairing workable. Both Neocaridina shrimp and swordtails like hard, slightly alkaline water, so a pH around 7.5 to 8.0 and a temperature near 76F suits both. Swordtails don't need salt, so that molly-style conflict is off the table. Never pair swordtails with soft-water Caridina shrimp, though.

◆Which shrimp is best to keep with swordtails?

Amano shrimp. At up to 2 inches they're too big for most swordtails to swallow, and they're excellent algae grazers. They don't breed in freshwater, so you keep them as a cleanup crew rather than a colony, which fits a swordtail community tank well anyway.

◆How many shrimp should I add to a swordtail tank?

Start with 15 to 20 rather than a few. You'll lose some to the swordtails, and a larger group stays bolder and more visible. Add them to a mature, planted tank and let them settle before assuming the number you can count is the number you have.

The Bottom Line

Can shrimp live with swordtails? Adults can, in a big, heavily planted, well-covered tank with well-fed fish, and amano shrimp handle it best of all. What won't happen is a breeding colony, because swordtails eat the babies as fast as they appear, and these fish are large and active enough to be a real threat to adults too. Decide what you actually want first. For a cleanup crew, swordtails and amanos get along fine. For a growing shrimp colony, give the shrimp a tank of their own and use our best tank mates for cherry shrimp guide to pick fish that treat your shrimp as neighbors rather than lunch.