Ring Nerite Snail (Neritina sp.)

Ring Nerite Snail is the supplier's trade name for this compact, amber-and-dark patterned freshwater aquarium snail. The stock record identifies it as Neritina sp. ring rather than as a fully determined species. That is the most accurate identity to use: several similar trade forms appear under O-ring or ring-snail names, but the available supplier evidence does not establish that this batch is Neritodryas javanica or any other named species.

This listing supplies one unsexed snail per selected quantity. The supplier's sale grade is approximately 2 cm, with a stated maximum of about 3 cm. These are useful planning figures, not a promise that every living shell will have one exact measurement. Shell colour, ring width, growth, age and the method used to measure the shell all create normal variation. Quantity one is not a pair, even though the second gallery image shows two illustrative animals.

Choose this snail for a mature, filtered aquarium with stable mineral-bearing water and established grazing surfaces. It can browse biofilm, diatoms and selected soft surface growth, but no snail is a guaranteed solution for every kind of algae. It still needs suitable food when natural films are sparse, and it does not replace water testing, glass cleaning, plant care or control of excess light and nutrients.

The four existing gallery images are representative illustrations based on the supplier reference, not photographs of the exact animal that will be dispatched. They communicate the broad amber shell and dark ring pattern, while scale, anatomy and colour are stylised. The actual snail may be less intensely marked or differently proportioned.

What exactly will I receive?

Each basket quantity represents one living snail from the current stock. The approximately 2 cm supplier grade is the expected sale band, not a calibrated measurement certificate. A shell can also be measured along different axes, so two healthy individuals may be described differently even when they are a similar overall size. The supplier states a maximum of about 3 cm, but growth remains individual and the exact species has not been resolved.

If more than one is wanted, increase the quantity in the basket. Do not decide the number from litres alone. Each animal needs accessible mature surfaces and enough food after visible growth has been reduced. A lightly stocked 60-litre aquarium with little biofilm may feed fewer grazers than a smaller, well-established planted setup. Observe food availability and water stability rather than using a fixed snails-per-litre rule.

The live stock and price shown in the buy box are the current commercial source of truth. Eligible livestock orders include our current Live Arrival Guarantee; postcode, dispatch and evidence requirements are explained on the delivery page. Eligible first orders can use WELCOME10 for 10% off under the current checkout terms. Prepare the aquarium before ordering, because neither offer makes an immature or unsuitable tank safe.

Name, taxonomy and evidence limits

The supplier record says Neritina / sp. ring. When that full trade label is submitted to the GBIF species matcher, it resolves only to the genus Neritina in the family Neritidae. It does not resolve to a named species. The title therefore keeps the useful customer name while retaining the honest genus-level scientific label.

Some UK and international shops use O-ring Nerite for Neritodryas javanica. MolluscaBase accepts that as a separate brackish species, but a valid name in a database is not evidence that this supplier batch belongs to it. Relabelling the stock from competitor wording would create false precision. This page does not claim that name, a locality, wild collection or captive breeding.

Trade names are useful for shopping, but they are not always stable taxonomic labels. Shell patterns can overlap, names can be reused, and juveniles may not show every adult character. A customer receives the trade form described and illustrated here, not a locality-certified specimen. This distinction also prevents care advice for a confidently identified brackish species from being copied onto a freshwater listing without evidence.

If exact taxonomy is essential for a specialist breeding or research project, contact us before ordering and explain what evidence is required. The contact page is the right route for a stock-specific question. We can describe the current supplier record and visible stock, but we will not invent a species determination that the evidence cannot support.

Shell appearance, size and gallery limits

The supplier reference shows a low-spired amber-to-brown shell crossed by multiple dark rings or vertical bands. Living stock may carry finer, broader, broken or less contrasting markings. Growth lines, small areas of wear and shifts in colour can be visible on an otherwise active animal. Lighting and background colour also change how strongly the pattern appears through glass.

The supplier grade of about 2 cm gives a practical expectation at sale, while the stated maximum of about 3 cm helps with planning. Neither number should be used to judge health in isolation. A slightly smaller snail can be active and well formed; a larger shell does not prove a particular age or sex. Measure only when necessary, avoid prolonged handling, and do not compare a living animal against an enlarged square image as though the image were to scale.

Is this the right aquarium snail for me?

This can be a good choice for an aquarist who already has a cycled aquarium, tests the water, understands that natural grazing is finite and can avoid predatory tank mates. Its compact size and non-predatory feeding style suit many peaceful community or planted setups where the chemistry overlaps. It can be kept alone, so there is no welfare requirement to buy a group.

It is a poor choice for an uncycled tank, very soft acidic water, an uncovered aquarium, a spotless new aquascape with no established films, or a community containing known snail predators. It is also unsuitable where treatment plans rely on products that are not explicitly safe for the invertebrates present. A snail should never be bought only as a disposable cleaning tool.

For a broader view of available types, use the Nerite Snail collection or browse the wider aquarium snail range. The dedicated Nerite Snail care guide owns the general topic; this product page focuses on the order, evidence and practical decisions specific to the ring trade form.

Tank size, maturity and stocking

OATA's freshwater shrimp and snail guidance gives at least 10 litres as a broad floor for a group of small freshwater shrimp or snails and explains that larger aquaria are more stable. That general floor is not a product-specific stocking formula. For one of these snails, 20 litres or more is the practical starting point, with more space required when fish, several snails or other surface grazers share the system.

Volume matters because greater water mass usually changes temperature and chemistry more slowly, but usable surface area and maturity matter too. A tall bare aquarium can contain many litres while offering little grazing area. Wood, stone, mature plant leaves and aquarium glass create useful surfaces, provided all decor is aquarium-safe and arranged without crushing traps.

A cycled filter means the aquarium can process normal waste without detectable ammonia or nitrite. Maturity adds something different: stable microbial communities and naturally renewed biofilm. A test result of zero ammonia on the day a new tank is filled does not prove that the system is cycled or able to support an invertebrate.

Water parameters and testing

Petra's supplier record gives 19-26°C, pH 6.8-8.5 and 10-31 dGH for this stock. OATA gives a broader group-level envelope of 17-27°C, pH 6.5-8.0 and 4-18 dGH for freshwater shrimp and snails while stressing that species-specific advice is required. The supplier values are the closer stock-specific evidence here, but the overlap should be used as a planning range rather than as permission to make sudden adjustments.

Do not chase a chosen number with large doses of buffer, acid or mineral salts. Stability within a suitable range is normally safer than repeated swings caused by overcorrection. If source water falls outside the intended conditions, plan a repeatable water-preparation method before the animal arrives. The Water Parameter Matcher can help compare measured conditions, but it cannot replace a test kit or resolve a stock-specific uncertainty by itself.

Mineral availability matters because shell material is not repaired simply by adding food after damage appears. Test both the aquarium and replacement water, keep records, and check why pH or hardness is changing. Old substrate, active aquasoil, large wood additions, source-water variation and unmeasured top-ups can all affect chemistry. Never add a random shell product without knowing what it will change.

Filtration, oxygen and a secure cover

A working biological filter is essential. Choose an intake arrangement that does not trap the snail or expose it to an unguarded impeller. A sponge pre-filter can reduce risk where the intake geometry is unsuitable, but it must be cleaned in aquarium water as needed so that flow is not choked. Filter capacity should be planned for the whole community, not for the snail alone.

Maintain appropriate circulation and surface movement without creating a jet that repeatedly dislodges the animal. Warm water holds less oxygen than cool water, while decaying food and overcrowding increase demand. Persistent inactivity, repeated surface congregation or unusual escape behaviour should trigger tests of temperature, oxygenation, ammonia, nitrite and possible contamination rather than an assumption that the snail is simply adventurous.

Neritid snails can travel above the waterline. Fit a secure lid and close realistic gaps around cables, pipework and hang-on equipment. Leave safe access to the water surface according to the aquarium design, but prevent the animal from reaching a dry floor or becoming trapped behind a cover. Check the lid after every maintenance session.

Aquascape, surfaces and plant safety

Provide a mixture of accessible hard surfaces such as smooth aquarium stone, seasoned wood and open areas of glass. Mature plant leaves can also support films. Avoid unstable rock piles, narrow crushing gaps and decor with sharp edges that could trap the shell or soft foot. Every hardscape piece should remain secure when a snail moves beneath or across it.

This stock is kept as a surface grazer and is not selected as a plant-eating animal. Healthy established plant tissue is normally left alone, while softened, damaged or decaying material may be investigated. That distinction is important: seeing a snail on a leaf does not prove that it ate the healthy leaf. Review plant damage alongside nutrient deficiency, melt, physical injury and other livestock.

Use aquarium-safe materials and rinse new items appropriately. Avoid household cleaners, metal ornaments of unknown composition and decor treated with unverified chemicals. If a second-hand tank or tool may have been exposed to copper medication, do not assume a quick rinse makes it safe for sensitive invertebrates.

Diet and a practical feeding plan

Natural feeding centres on surface films: biofilm, diatoms and some soft algal growth. The exact proportion consumed varies with the individual, surface, maturity and available alternatives. A snail actively moving across the glass may be grazing on material too fine to see, while a visibly green patch may be unappealing or physically difficult to remove.

When natural food is limited, offer a small portion of a reputable invertebrate food or algae-based wafer that is suitable for the entire community. Place it where the snail can reach it without being excluded by fish or larger snails. Start modestly, observe whether it is consumed, and remove persistent leftovers before they decay. Feeding more is not a cure for every inactivity problem.

Competition is easy to miss. Fast fish may take a wafer before a slow grazer reaches it, and several snails can exhaust a small mature area. Observe after lights-out as well as during the day. If the shell condition is declining or the animal remains inactive, review water, contaminants, predation pressure and acclimation in addition to diet.

What it may graze, and what it will not solve

A ring-patterned nerite can contribute to cleaning fine films from accessible hard surfaces. It may browse brown diatom coatings and some soft green growth, but individual preferences differ. Black beard algae, long hair algae, cyanobacterial films and tough established spots should not be advertised as guaranteed foods. Claims that one animal will clear all of them create a poor buying decision and can leave the animal without planned nutrition once the visible patch changes.

Think of the snail as part of a living clean-up community, not as maintenance equipment. Keep a realistic feeding plan, monitor body and shell condition, and leave enough edible surface growth. A perfectly polished aquarium is not automatically a well-fed aquarium.

Tank mates and predation risks

Peaceful community fish and dwarf shrimp may be compatible when temperature, pH, hardness, space, feeding and medication needs all overlap. Compatibility must be checked by exact species and adult behaviour. A fish being small or sold as peaceful does not prove it will ignore antennae, the foot or a newly introduced snail.

Avoid puffers, known snail-eating loaches, assassin snails, crayfish and animals likely to bite, pull, crush or repeatedly harass it. The Assassin Snail is displayed elsewhere as a separate predatory choice and should not share a tank with an animal intended to be protected. Large opportunistic cichlids and other powerful feeders need individual assessment rather than a blanket approval.

Do not use salt, medication or an algaecide solely because the fish population tolerates it. Every treatment decision must account for the invertebrates, plants and biological filter. OATA warns that freshwater snails are highly sensitive to copper. Use only products explicitly labelled suitable for the species present, follow the current instructions, and prevent nets, buckets or siphons from transferring residues between systems.

One snail or several?

Freshwater snails are not social animals in the sense that schooling fish are social. One can be kept alone without buying a companion. Keeping several can create an attractive display, but the decision should be based on available grazing area, food access, water stability and total stocking rather than concern that a single animal will be lonely.

If adding multiple grazers, increase the group gradually and watch the aquarium after the initial visible films have been reduced. A clean-looking tank can become food-poor quickly. Provide several feeding locations where needed, prevent dominant fish from taking every supplement, and remove leftovers before they affect water quality.

Other nerite trade forms can be compared without turning names into duplicates. The Zebra Horned Nerite Snail, Parallel Nerite Snail and Batik Nerite Snail have separate stock identities and listing evidence. Choose by verified care fit and the current stock record, not by assuming every patterned shell is the same animal.

Egg capsules and reproduction limits

The stock is unsexed and the exact species is unresolved, so this page cannot promise a male, female, breeding pair or a species-specific egg form. Females in some neritid species may attach pale individual capsules to hard surfaces. Their presence does not prove that juveniles will develop, and their absence does not identify the sex of one newly delivered animal.

A peer-reviewed review of tropical freshwater neritid life cycles describes amphidromy in many members of the family: larvae develop in marine conditions before juveniles recruit back to freshwater. Research on Neritina asperulata also documents a marine larval phase, but that is a different named species and cannot be copied as exact biology for this stock.

The responsible aquarium expectation is therefore that juvenile recruitment should not be expected in an ordinary freshwater community tank. That does not justify an absolute claim that no capsule could ever hatch under any condition. Do not add salt or make abrupt salinity changes in an attempt to breed an unidentified animal. A specialist project would need a confirmed species, appropriate facilities and a researched larval-feeding plan.

Arrival and gradual acclimation

Prepare the tank and testing equipment before opening the parcel. Follow the current delivery instructions first, because packaging and seasonal handling can change. Keep the aquarium lights dim, compare transport and aquarium conditions, and avoid leaving the animal in a sealed bag longer than directed.

OATA advises floating the closed bag for around 10 minutes to begin temperature equalisation, then gradually introducing small amounts of aquarium water for at least 30 minutes. The aim is a controlled transition, not an exact stopwatch ritual that ignores a large chemistry difference. Transfer the snail with as little transport water as practical and dispose of bag water rather than pouring it into the aquarium.

1. Confirm the aquarium is ready, covered and within the planned measured range.
2. Read the live-arrival and acclimation instructions supplied with the order.
3. Dim the lights and keep the bag away from direct sun, heaters and cold drafts.
4. Begin temperature equalisation as instructed.
5. Add small amounts of aquarium water gradually for at least 30 minutes unless the current order instructions specify a different method.
6. Transfer the animal gently, minimise bag-water transfer and secure the lid.
7. Observe without repeatedly lifting or turning the snail.

The acclimation timer can support a gradual sequence, but measured conditions and the order instructions take priority. A snail may rest after transport. Do not repeatedly detach it from a surface to test whether it is alive; instead check position changes, foot adhesion, odour only when genuinely necessary, and the aquarium's water quality.

Shell condition, behaviour and warning signs

Normal activity varies. A settled animal may move across glass, wood, stone, plants or just above the waterline, then remain still for a period. It may be more active after the lights dim. Position alone is not a diagnosis. Look for trends alongside attachment strength, body appearance, water tests, recent treatment, tank-mate behaviour and access to food.

Shell wear can record past conditions and does not always disappear after care improves. Fresh erosion, thinning or pitting should prompt a review of pH, hardness, source water, diet and possible contaminants. Do not paint, glue or coat the shell. A deep break, exposed tissue, persistent loss of attachment or a strong foul smell needs prompt expert assessment.

There is no responsible exact lifespan promise for an unidentified supplier trade form. Longevity varies with species, age at sale, transport history and long-term husbandry. The useful commitment is to stable care: mature water, appropriate minerals, sufficient food, safe companions and prompt response to measured problems.

Routine maintenance without stripping the food base

Test at a consistent frequency, perform appropriately sized water changes and keep replacement water reasonably matched for temperature and chemistry. Clean the filter in a way that preserves biological function, and never wash mature media under chlorinated tap water unless the manufacturer and water-treatment method specifically make that safe. Avoid replacing every mature component at once.

Leave some safe surfaces with mature films rather than polishing every pane, rock and piece of wood on the same day. This is not permission to neglect the aquarium. Remove decaying food, dead plant material and accumulated waste while preserving enough natural grazing opportunity. A viewing pane can be cleaned while less visible hardscape remains mature.

Count livestock during maintenance and inspect the lid, intake guards and equipment gaps. A missing snail may be above the waterline, behind hardscape or outside the tank. Move decor slowly and support it securely; never pull a firmly attached snail from the glass by force.

Comparing this snail with other choices

Choose among snail listings by evidence, mature size, feeding style, predation risk and the aquarium's measured water. Similar commercial keywords do not make different animals interchangeable. A compact patterned nerite is selected mainly as a non-predatory surface grazer, while an assassin snail is predatory and a rabbit snail has a different body shape, growth pattern and space requirement.

No comparison table can replace checking the current listing and the needs of existing animals. If the aquarium is not mature enough for a grazer, the right decision may be to wait rather than substitute another snail immediately.

Delivery, discounts and final pre-order checks

Before checkout, confirm that the active quantity means one snail, the aquarium is cycled and covered, the water has been measured, and every tank mate has been assessed. Ensure someone can receive the parcel under the current delivery terms. Do not order livestock to wait while a tank is assembled or while an incompatible treatment remains in the water.

The current delivery and Live Arrival Guarantee terms explain eligible livestock coverage, postcode limits, dispatch timing and the evidence needed if there is a problem. They are the source of truth rather than a fixed next-day promise in the product description. WELCOME10 provides 10% off eligible first orders under the current checkout conditions.

Sources and how they were used

The supplier record supplies the trade identity, sale grade, stated maximum and stock-specific water range. GBIF is used only to establish that the full supplier phrase resolves to the genus Neritina, not to force a species. MolluscaBase is used to explain why a competitor's Neritodryas javanica wording cannot be transferred without proof.

OATA supports the general freshwater-snail boundaries for cycling, filtration, covering the aquarium, water testing, acclimation, copper sensitivity, feeding and group behaviour. The two research papers support only the cautious family-level explanation of specialised neritid larval development. They are not treated as exact breeding instructions for this unidentified stock.

• GBIF name match for the supplier trade label
• MolluscaBase record for the separate name Neritodryas javanica
• OATA freshwater shrimp and snail care guide
• Review of amphidromy and life cycles in tropical freshwater Neritidae
• Peer-reviewed study of marine larval dispersal in Neritina asperulata

Sources are linked so that identity and care claims can be checked. Where the evidence belongs to the family or to another named species, the text says so. This prevents a scientific-looking citation from being used to disguise an unsupported exact claim.

Frequently asked questions

How many snails does one quantity buy?

One quantity buys one unsexed snail. It is not a pair or pack. The second gallery image contains two illustrative animals, but the image does not change the sale unit.

What size will it be on arrival?

The current supplier sale grade is approximately 2 cm. This is a planning figure rather than an exact promise because living shells and measurement methods vary. The supplier states a maximum of about 3 cm.

Is this definitely Neritodryas javanica?

No species-level identification is claimed. The supplier record says Neritina sp. ring, and taxonomic matching resolves that wording only to the genus. A similar trade name used elsewhere is not diagnostic evidence for this batch.

Will the snail look exactly like the gallery?

No. The four retained images are representative illustrations based on the supplier reference, not photographs of the exact snail. Amber colour, dark rings, scale and proportions vary between the illustrations and living stock.

Can I choose the sex or ring pattern?

No. Stock is supplied unsexed, and no particular shell marking is guaranteed. A visual request would require a current agreed stock-selection process, which this standard quantity listing does not provide.

What is the minimum tank size?

OATA gives 10 litres as a broad floor for groups of small freshwater shrimp or snails. We use 20 litres or more as the practical starting point for one because greater water stability and grazing area matter. Use more space with fish, several snails or competing grazers.

Can it go into a new aquarium?

Not safely just because the tank contains water. It needs a fully cycled, filtered aquarium with zero ammonia and nitrite, stable measured chemistry and established surface films. A newly filled aquarium can be both chemically unsafe and food-poor.

What temperature should I use?

The supplier range is 19-26 degrees C. Choose a stable value inside that range that also suits every other inhabitant. Avoid sudden changes, and verify heater performance with a dependable thermometer.

What pH and hardness does it need?

The supplier gives pH 6.8-8.5 and 10-31 dGH. Test the actual aquarium and replacement water. Do not chase a chosen number with abrupt chemical correction, and investigate conditions that cause fresh shell erosion.

Will it clean all the algae?

No. It may browse biofilm, diatoms and selected soft growth, but preferences differ and many problem types are not dependable foods. Lighting, nutrients, maintenance and the underlying cause still need to be managed.

What should I feed when the glass looks clean?

Offer a small portion of a suitable algae-based wafer or reputable invertebrate food and confirm that the snail can reach it. Remove persistent leftovers before they decay. Keep some mature surfaces available rather than cleaning everything at once.

Will it eat healthy aquarium plants?

It is kept as a surface grazer and normally leaves healthy established tissue alone. It may investigate soft, damaged or decaying material. Seeing it on a leaf does not by itself prove that it caused plant damage.

Can it live with shrimp?

It can often share a mature tank with peaceful dwarf shrimp when water, minerals, food and medication requirements overlap. Ensure both groups can reach food and that every treatment is explicitly safe for all invertebrates present.

Which tank mates should I avoid?

Avoid puffers, known snail-eating loaches, assassin snails, crayfish and other animals likely to bite, pull or crush it. Check each proposed fish by exact species and adult behaviour rather than relying on a generic peaceful label.

Are copper treatments safe?

Do not assume so. OATA warns that freshwater snails are highly sensitive to copper. Use only treatments explicitly suitable for the invertebrates present, follow current instructions and prevent contaminated tools from moving residues between aquariums.

Does it need other snails for company?

No. Freshwater snails are not social in the way schooling fish are, so one can be kept alone. Several may be kept only when the aquarium has enough mature surface, supplementary food, space and filtration for them.

Will it lay eggs in freshwater?

A female in some neritid species may leave pale capsules on hard surfaces, but this animal is unsexed and not identified to species. Capsules are possible, not guaranteed, and their presence does not promise developing juveniles.

Will eggs overrun the aquarium?

Juvenile recruitment should not be expected in an ordinary freshwater community tank because many neritids have specialised larval development. That is not a claim of zero hatching under every possible condition. Do not make abrupt salinity changes to experiment with an unidentified stock.

Why is the snail above the waterline?

Exploration can occur, which is why a secure lid is required. Repeated escape attempts should prompt checks of ammonia, nitrite, temperature, oxygenation, contaminants, food and tank-mate pressure. Close gaps around equipment before the animal arrives.

How should I acclimate it?

Follow the order instructions, dim the lights, begin temperature equalisation and add small amounts of aquarium water gradually for at least 30 minutes unless the current instructions say otherwise. Transfer gently with minimal bag water and secure the lid.

Does the Live Arrival Guarantee apply?

Eligible livestock orders are covered under the current terms. Read the delivery page before ordering because postcode, dispatch, receipt and evidence conditions apply. The guarantee is not a fixed next-day-delivery promise.