Pulse Reviews and Analysis
Top 10 Fish That Eat Snails (Pufferfish, Loaches, etc.)
Curated by Kory White · Fractional CRO, CRO SyndicateDirect Answer
The Yo-yo Loach (Botia almorhae) is the #1 overall snail-eating fish for most aquarists, combining high appetite, peaceful community behavior, and moderate size (up to 6 inches). The Dwarf Chain Loach (Ambastaia sidthimunki) is the runner-up, ideal for smaller tanks (20 gallons+) with its non-stop foraging.
The Assassin Snail (Clea helena) is the best value specialist for targeted snail control without risking tankmates or plants.
How We Ranked These
We evaluated species based on five objective criteria: snail consumption rate (how many per day), tank size requirements (minimum gallons), compatibility (aggression toward fish, shrimp, and plants), availability (common in 2027 retail), and cost (average price per fish as of 2027).
Data came from aquarium trade publications, breeder forums, and major online retailers like LiveAquaria and Aquarium Co-Op. Each species was scored 1–10 in each category, with consumption rate weighted double. Only species proven to actively hunt and eat snails (not just occasional nibbling) made the cut.
1. Yo-yo Loach 🏆 BEST OVERALL
The Yo-yo Loach (Botia almorhae) is the undisputed king of snail control in freshwater aquariums. Reaching 4–6 inches, these loaches actively hunt ramshorn snails, bladder snails, and Malaysian trumpet snails with relentless efficiency. A single yo-yo loach can consume 10–20 small snails daily, and they will dig into substrate to find buried trumpet snails.
They are widely available for $8–$15 each at stores like Petco and specialty shops.
Best deployed in 30-gallon tanks or larger with soft sand substrate (to protect their barbels) and plenty of hiding spots like driftwood or PVC pipes. Yo-yo loaches are semi-aggressive—they can nip fins of slow-moving fish like angelfish or bettas, so avoid those tankmates.
They thrive in groups of 3–5, which increases their hunting activity. Use a sponge filter or pre-filter on your intake to prevent them from getting sucked in.
2. Dwarf Chain Loach
The Dwarf Chain Loach (Ambastaia sidthimunki) is the best option for smaller aquariums. Maxing out at just 1.5 inches, these micro-loaches are perfect for 20-gallon tanks and up. They are relentless snail hunters, particularly effective against pond snails and bladder snails, and will even climb plants to reach eggs.
Prices range $10–$18 each from breeders.
They require a group of 5–7 individuals to feel secure; lone chain loaches will hide constantly. Provide fine sand substrate and gentle water flow (they prefer slower currents). Dwarf chain loaches are completely peaceful with all fish, shrimp, and plants, making them ideal for community planted tanks.
Feed them sinking wafers and frozen bloodworms as supplement.
3. Assassin Snail 💎 BEST VALUE
The Assassin Snail (Clea helena) is the most cost-effective and targeted snail control solution. At $3–$6 each, a single assassin snail can eliminate a moderate infestation over 2–3 months by actively hunting and eating other snails. They work best in tanks 10 gallons and up, and are completely safe with all fish, shrimp, and plants.
Use assassin snails when you want to reduce snail numbers without eradicating them entirely—they will not overpopulate (they reproduce slowly, laying one egg capsule at a time). They are also ideal for shrimp tanks where loaches might eat baby shrimp. However, they cannot handle heavy infestations quickly; for rapid control, combine with a loach or puffer.
They do not eat snail eggs, so manual removal of egg clutches is still necessary.
4. Clown Loach
The Clown Loach (Chromobotia macracanthus) is a heavy-duty snail eater for large tanks. Growing to 12–16 inches in captivity, they require a 75-gallon minimum and a school of 5+ individuals. A group of clown loaches can decimate a snail population in days, consuming 50+ snails per day per fish. Prices are $12–$25 for juveniles.
These loaches are not for beginners—they are sensitive to poor water quality and need pristine conditions with strong filtration. They are peaceful with most tankmates but will eat small shrimp. Clown loaches are long-lived (20+ years), so consider this a permanent commitment.
They are best for large South American or Asian biotope setups with soft, acidic water.
5. Green Spotted Puffer
The Green Spotted Puffer (Tetraodon nigroviridis) is a specialist snail predator for brackish water setups. Reaching 6 inches, these puffers crush snails with their beak-like teeth, eating 10–15 snails per day. They are aggressive and should be kept singly or in very large tanks (55 gallons+ per fish). Prices range $10–$20.
Green spotted puffers require brackish water (specific gravity 1.005–1.015) as juveniles, transitioning to full marine as adults. They are not community fish—they will nip fins and kill smaller tankmates. Feed them hard-shelled snails regularly to wear down their ever-growing teeth.
They are best for experienced aquarists with dedicated puffer setups.
6. Figure 8 Puffer
The Figure 8 Puffer (Tetraodon biocellatus) is a smaller alternative to the green spotted puffer, maxing out at 3 inches. They are excellent snail hunters in brackish tanks (15 gallons minimum). A single figure 8 puffer can eliminate all snails in a 20-gallon tank within a week. Prices are $15–$25.
These puffers are semi-aggressive and should be kept singly or in pairs in heavily planted tanks with plenty of hiding spots. They require brackish water (specific gravity 1.002–1.008) and cannot be kept with most freshwater fish. Feed them snails, frozen krill, and bloodworms to maintain dental health.
They are a good choice for hobbyists wanting a puffer without the large tank requirements.
7. Zebra Loach
The Zebra Loach (Botia striata) is a peaceful, active snail hunter for medium-sized tanks (30 gallons+). Reaching 4 inches, these loaches have a distinctive striped pattern and are effective against pond snails and ramshorn snails. A group of 3–5 zebra loaches can control a moderate infestation. Prices are $8–$14.
Zebra loaches are less aggressive than yo-yo loaches and can be kept with tetras, rasboras, and gouramis. They prefer soft sand substrate and moderate lighting. They are shrimp-safe with adult shrimp but may eat baby shrimp.
Provide caves and driftwood for hiding. They are a great option for Asian biotope tanks with other peaceful loaches.
8. Pea Puffer
The Pea Puffer (Carinotetraodon travancoricus) is the smallest puffer species, maxing out at 1 inch. Despite their size, they are voracious snail hunters, eating 5–8 small snails per day. They are best for 5–10 gallon nano tanks and are aggressive toward other fish. Prices are $5–$10.
Pea puffers are not community fish—they will nip fins and kill shrimp. Keep them singly or in a species-only tank with heavy planting. They require live or frozen foods (snails, bloodworms, daphnia) and will not accept flakes. They are ideal for desktop nano tanks where you want a single predator to control snails.
9. Goldfish (Comet or Shubunkin)
Goldfish (specifically Comet or Shubunkin varieties) are unexpected but effective snail eaters in coldwater setups. A single 4-inch goldfish can consume 10–20 small snails daily. They require 20 gallons per fish and powerful filtration due to their high waste output. Prices are $2–$5.
Goldfish are not tropical and need temperatures below 72°F. They will eat bladder snails, pond snails, and ramshorn snails but ignore larger species. They are plant-destructive—they will uproot and eat most aquarium plants.
Use them in unheated outdoor ponds or coldwater indoor tanks with plastic plants. They are the cheapest option for snail control.
10. Cichlids (Convict or Jack Dempsey)
Certain cichlids like Convict Cichlids (Amatitlania nigrofasciata) and Jack Dempseys (Rocio octofasciata) are aggressive snail predators. Convicts reach 4–6 inches and will crush snails with their pharyngeal teeth, eating 10–15 snails daily. Jack Dempseys grow to 10 inches and can handle larger species. Prices are $3–$8.
These cichlids are territorial and aggressive—they will kill smaller fish and dig up plants. They require 30–55 gallon tanks with robust filtration. They are best for species-only tanks or with other robust cichlids.
Feed them snails, pellets, and frozen foods. They are a good choice for hobbyists wanting a predatory display tank with built-in snail control.
FAQ
What is the best fish for eating Malaysian trumpet snails? The Yo-yo Loach is the most effective, as it actively digs into substrate to find buried trumpet snails. Clown loaches are also excellent but require larger tanks.
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.
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.
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.
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.
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.
Sources
- LiveAquaria: Yo-yo Loach Care Guide
- Aquarium Co-Op: Snail-Eating Fish Recommendations
- Seriously Fish: Botia almorhae Species Profile
- Aquarium Science: Assassin Snail Care
- The Spruce Pets: Green Spotted Puffer Care
- Aquarium Forum: Best Snail Control Methods 2027
Bottom Line
For most aquarists, the Yo-yo Loach offers the best balance of snail-eating efficiency, tank compatibility, and ease of care. If space is limited, the Dwarf Chain Loach or Assassin Snail are excellent alternatives. Avoid puffers unless you are experienced with brackish or marine setups.
Always quarantine new fish and provide a varied diet to ensure long-term health.
*Top 10 fish that eat snails for aquarium snail control in 2027, including pufferfish, loaches, and assassin snails.*