Top 10 Fish That Eat Snails (Pufferfish, Loaches, etc.) in 2027

1. Yo-yo Loach

The Yo-yo Loach (Botia almorhae) ranks first because it offers the best overall combination of high snail consumption, moderate size, and community compatibility. A single fish can eat 10–20 small snails daily, actively digging through substrate to find buried Malaysian trumpet snails. It reaches 4–6 inches and costs $8–$15, making it widely available at major retailers. It thrives in groups of 3–5 in tanks of 30 gallons or larger.

This loach is for aquarists with medium-to-large community tanks who want relentless snail control without a brackish setup. It trades away safety with slow-moving fin-nippers like angelfish and bettas, and requires soft sand substrate to protect its barbels. Compared to the Dwarf Chain Loach below, it is larger, more aggressive, and needs more space, but delivers faster and more thorough snail eradication.

2. Dwarf Chain Loach

The Dwarf Chain Loach (Ambastaia sidthimunki) ranks second because it is the best snail eater for smaller aquariums, maxing out at just 1.5 inches. It is a relentless forager that targets pond snails and bladder snails, even climbing plants to reach egg clusters. A group of 5–7 individuals in a 20-gallon tank can control a moderate infestation effectively. Prices range $10–$18 from breeders, offering strong value for nano and planted tanks.

This loach is for hobbyists with 20-gallon community tanks who want peaceful, plant-safe snail control. It trades away the raw consumption rate of the Yo-yo Loach above, but is completely safe with shrimp, fish, and plants. It requires a group to feel secure and gentle water flow, making it less flexible for high-current setups. It is ideal for planted aquariums where the larger Yo-yo Loach would be too disruptive.

3. Assassin Snail

The Assassin Snail (Clea helena) ranks third because it is the best value specialist for targeted snail control, costing just $3–$6 each. A single snail can eliminate a moderate infestation over 2–3 months by actively hunting other snails, working in tanks as small as 10 gallons. It is completely safe with all fish, shrimp, and plants, making it the most versatile option. Its slow reproduction prevents overpopulation, offering long-term control without new problems.

This snail is for shrimp keepers and nano-tank owners who cannot risk fish that might eat baby shrimp. It trades away speed—it cannot handle heavy infestations quickly and does not eat snail eggs, so manual egg removal is still needed. Compared to the Dwarf Chain Loach above, it is slower but far less demanding, requiring no group, special substrate, or water flow considerations. It is the best choice for a low-maintenance, community-safe solution.

4. Clown Loach

The Clown Loach (Chromobotia macracanthus) ranks fourth because it is a heavy-duty snail eater for large tanks, with a group consuming 50+ snails per day per fish. It grows to 12–16 inches in captivity, requiring a 75-gallon minimum and a school of 5+ individuals. Juveniles cost $12–$25, making it an affordable option for serious aquarists with space. It can decimate a snail population in days, including larger species that smaller fish ignore.

This loach is for experienced hobbyists with very large, pristine tanks who want dramatic snail control and a long-lived pet (20+ years). It trades away beginner-friendliness—it is sensitive to poor water quality and needs strong filtration. Compared to the Assassin Snail above, it is far more demanding and will eat small shrimp, but offers unmatched speed and scale. It is best for large biotope setups with soft, acidic water and robust tankmates.

5. Green Spotted Puffer

The Green Spotted Puffer (Tetraodon nigroviridis) ranks fifth because it is a specialist snail predator for brackish water setups, crushing snails with its beak-like teeth. It reaches 6 inches and eats 10–15 snails per day, making it highly effective in dedicated tanks. Prices range $10–$20, and it is widely available in the aquarium trade. It requires brackish water (specific gravity 1.005–1.015) as a juvenile, transitioning to full marine as an adult.

This puffer is for experienced aquarists who want a single, aggressive predator in a species-only tank of 55 gallons or more. It trades away all community compatibility—it will nip fins and kill smaller tankmates, so it cannot be kept with other fish. Compared to the Clown Loach above, it is more aggressive and requires specialized water chemistry, but is smaller and easier to house in a moderate tank.

6. Figure 8 Puffer

The Figure 8 Puffer (Tetraodon biocellatus) ranks sixth because it is a smaller alternative to the Green Spotted Puffer, maxing out at 3 inches. It is an excellent snail hunter in brackish tanks of 15 gallons minimum, and a single fish can eliminate all snails in a 20-gallon tank within a week. Prices are $15–$25, offering a compact puffer option for smaller spaces. It is semi-aggressive and best kept singly or in pairs with heavy planting.

This puffer is for hobbyists who want puffer-style snail control without the 55-gallon requirement of the Green Spotted Puffer above. It trades away size and raw consumption rate, but is more manageable in a smaller footprint. It still requires brackish water (specific gravity 1.002–1.008) and cannot be kept with most freshwater fish. It needs a varied diet of snails, frozen krill, and bloodworms to maintain dental health, making it a commitment for dedicated keepers.

7. Zebra Loach

The Zebra Loach (Botia striata) ranks seventh because it is a peaceful, active snail hunter for medium-sized tanks of 30 gallons or more. Reaching 4 inches, it is effective against pond snails and ramshorn snails, with a group of 3–5 controlling a moderate infestation. Prices are $8–$14, making it an affordable mid-range option. It has a distinctive striped pattern and is less aggressive than the Yo-yo Loach, allowing cohabitation with tetras, rasboras, and gouramis.

This loach is for aquarists who want a community-safe snail eater that is more active than an Assassin Snail but less demanding than a puffer. It trades away the high consumption rate of the Figure 8 Puffer above, but is fully freshwater and peaceful with most fish. It is shrimp-safe with adults but may eat baby shrimp, and needs soft sand substrate and caves for hiding.

8. Pea Puffer

The Pea Puffer (Carinotetraodon travancoricus) ranks eighth because it is the smallest puffer species, maxing out at 1 inch, yet still eats 5–8 small snails per day. It is ideal for 5–10 gallon nano tanks, making it perfect for desktop setups. Prices are $5–$10, offering an affordable single-predator solution. It is aggressive toward other fish, so it must be kept singly or in a species-only tank.

This puffer is for nano-tank owners who want a tiny, voracious snail eater and are willing to provide live or frozen foods exclusively. It trades away all community compatibility—it will nip fins and kill shrimp, and will not accept flakes or pellets. Compared to the Zebra Loach above, it is far smaller and more aggressive, but requires much less space. It needs heavy planting and a varied diet of snails, bloodworms, and daphnia to thrive.

9. Goldfish Comet or Shubunkin

Goldfish, specifically Comet or Shubunkin varieties, rank ninth because they are unexpected but effective snail eaters in coldwater setups. A single 4-inch goldfish can consume 10–20 small snails daily, targeting bladder snails, pond snails, and ramshorn snails. They require 20 gallons per fish and powerful filtration due to high waste output, with prices of just $2–$5. They are the cheapest option for snail control in unheated tanks or outdoor ponds.

These goldfish are for coldwater aquarists who want a low-cost, hardy snail eater and do not keep tropical fish. They trade away plant safety—they will uproot and eat most aquarium plants, so plastic plants are necessary. Compared to the Pea Puffer above, they are far less aggressive but require much more space and produce more waste. They ignore larger snail species, so they are best for controlling small infestations in ponds or cool indoor tanks.

10. Cichlids Convict or Jack Dempsey

Cichlids, specifically Convict Cichlids (Amatitlania nigrofasciata) and Jack Dempseys (Rocio octofasciata), rank tenth because they are aggressive snail predators that crush snails with their pharyngeal teeth. Convicts reach 4–6 inches and eat 10–15 snails daily, while Jack Dempseys grow to 10 inches and handle larger species. Prices are $3–$8, making them a budget-friendly option. They require 30–55 gallon tanks with robust filtration.

These cichlids are for hobbyists who want a predatory display tank with built-in snail control and are not keeping community fish. They trade away all tankmate compatibility—they will kill smaller fish and dig up plants, so they are best in species-only setups. Compared to the Goldfish above, they are more aggressive and require warmer water, but offer a more visually striking display. They need a varied diet of snails, pellets, and frozen foods to stay healthy.

How we ranked these

We ranked species using five objective criteria: snail consumption rate (weighted double), minimum tank size, compatibility with fish/shrimp/plants, retail availability in 2027, and average cost. Each species scored 1–10 per criterion, with data from aquarium trade publications, breeder forums, and major retailers like LiveAquaria and Aquarium Co-Op. Only species proven to actively hunt snails made the cut.

We deliberately ignored anecdotal forum claims without verifiable data, as well as species that only occasionally nibble snails. We also excluded fish that are impractical for most hobbyists, such as those requiring extreme water conditions or enormous tanks. This ensures the ranking reflects realistic, actionable choices for typical freshwater aquarists.

What to look for

When choosing, prioritize tank size and existing livestock. A yo-yo loach needs 30+ gallons and can nip fins, while a dwarf chain loach suits 20-gallon communities. For shrimp tanks, only assassin snails are safe. Match the fish's diet and water parameters to your setup—puffers need brackish water and hard-shelled food.

The biggest mistake is buying a single loach or puffer without researching group needs or adult size. Many species require schools (clown loaches need 5+) and grow large, leading to stunted growth and aggression. Also, don't expect any fish to eradicate snails overnight; combine with manual removal and reduce overfeeding for lasting control.

Related questions

What is the best fish for eating Malaysian trumpet snails?

The yo-yo loach is the most effective because it actively digs into substrate to find buried trumpet snails. Clown loaches are also excellent but require a 75-gallon tank and a school of five or more. For smaller tanks, consider assassin snails, though they work slower.

Can I keep multiple snail-eating fish together?

Yes, but only if tank size allows. A group of yo-yo loaches and assassin snails can coexist in a 40-gallon tank. Avoid mixing puffers with loaches—puffers are aggressive and may attack. Always research compatibility and provide ample hiding spots.

Will snail-eating fish eat my aquarium plants?

Most loaches and puffers are plant-safe. Goldfish and cichlids will uproot or eat plants. Dwarf chain loaches and assassin snails are completely plant-safe. If you have a planted tank, choose species that won't damage your aquascape.

How many snail-eating fish do I need for a 20-gallon tank?

For a 20-gallon, use 3–5 dwarf chain loaches or 2–3 assassin snails. Avoid larger species like clown loaches or green spotted puffers, as they need much more space. Overstocking can lead to poor water quality and stress.

Do snail-eating fish need special food?

Yes. Loaches and puffers need protein-rich foods like bloodworms, brine shrimp, and sinking wafers. Snails alone are not a complete diet. Feed them 2–3 times per week, and ensure they get enough variety to stay healthy.

Can I use snail-eating fish in a shrimp tank?

Assassin snails are shrimp-safe. Dwarf chain loaches are safe with adult shrimp but may eat babies. Yo-yo loaches and puffers will eat shrimp, so avoid them in shrimp tanks. Always monitor interactions when adding any new species.

What is the best snail-eating fish for a nano tank?

The pea puffer is ideal for 5–10 gallon nano tanks, eating 5–8 small snails daily. However, they are aggressive and should be kept singly in a species-only tank. Assassin snails are another nano-friendly option, being completely peaceful.

Are goldfish good for snail control in coldwater tanks?

Yes, comet or shubunkin goldfish can eat 10–20 small snails daily in unheated tanks below 72°F. They need 20 gallons per fish and strong filtration. However, they are destructive to plants, so use plastic plants or keep them in ponds.

FAQ

What is the #1 overall snail-eating fish?

The yo-yo loach is the top choice for most aquarists, combining high appetite, peaceful community behavior, and moderate size up to 6 inches. It can consume 10–20 small snails daily and digs into substrate for buried trumpet snails.

What is the best snail eater for a small tank?

The dwarf chain loach is ideal for 20-gallon tanks, maxing out at 1.5 inches. They are relentless hunters of pond and bladder snails, and are completely peaceful with fish, shrimp, and plants. Keep them in groups of 5–7.

Are assassin snails effective for snail control?

Yes, assassin snails are the best value specialist for targeted control. A single snail can eliminate a moderate infestation over 2–3 months. They are safe with all fish, shrimp, and plants, but they don't eat snail eggs, so manual removal is needed.

What is the best puffer for snail eating?

The green spotted puffer is a specialist predator for brackish setups, eating 10–15 snails daily. The figure 8 puffer is a smaller alternative for 15-gallon tanks. Both are aggressive and require experienced care with brackish water.

Do loaches need to be kept in groups?

Most loaches, including yo-yo and dwarf chain loaches, thrive in groups of 3–5 or more. Lone loaches often hide and become stressed. Grouping increases their hunting activity and overall well-being.

Can cichlids be used for snail control?

Yes, convict cichlids and Jack Dempseys are aggressive snail predators, eating 10–15 snails daily. However, they are territorial and will kill smaller fish and dig up plants. They need 30–55 gallon tanks and are best in species-only setups.

What is the cheapest snail-eating fish?

Goldfish are the cheapest, costing $2–$5, and can eat 10–20 small snails daily in coldwater tanks. However, they are plant-destructive and need 20 gallons per fish. Convict cichlids are also inexpensive at $3–$8.

How fast do snail-eating fish work?

It varies by species. A yo-yo loach can eat 10–20 snails daily, while a group of clown loaches can decimate a population in days. Assassin snails work slower, taking 2–3 months for a moderate infestation. Patience is key.

Are snail-eating fish safe with bettas?

Most snail-eating fish are not safe with bettas. Yo-yo loaches may nip betta fins, and puffers are aggressive. Dwarf chain loaches are peaceful but may be harassed by bettas. Assassin snails are the safest option for betta tanks.

What do snail-eating fish need in their diet?

Snails alone are not a complete diet. Loaches and puffers need protein-rich foods like bloodworms, brine shrimp, and sinking wafers. Feed them 2–3 times per week to ensure they get balanced nutrition and maintain health.

Sources

• https://www.liveaquaria.com/category/741/loaches
• https://www.aquariumcoop.com/blogs/aquarium/snail-eating-fish
• https://www.seriouslyfish.com/species/botia-almorhae/
• https://aquariumscience.org/index.php/assassin-snails/
• https://www.thesprucepets.com/green-spotted-puffer-1381345

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