Red racer nerite snail
Vittina waigiensis
The red racer nerite snail (Vittina waigiensis) has a strikingly variable red, orange, yellow and dark shell pattern. It is also sold as a red racer or gold racer nerite. The currently accepted name is Vittina waigiensis; Neritina waigiensis and several historical names are synonyms. It grazes on algae and biofilm, so it needs a mature aquarium with natural growth rather than a sterile tank. Adults reach about 3 cm. Values below are practical care guidance; sources disagree about minimum volume and exact limits, so none is presented as a hard biological boundary.
Plan your aquarium →At a glance
- Temperature
- 22–28 °C
- pH
- 7.0–8.0
- Diet
- Herbivore
- Adult size
- Up to 3 cm
- Temperament
- Peaceful
About this species
Vittina waigiensis (Lesson, 1831) belongs to the family Neritidae. The red racer nerite is recognized by highly variable lines and bands on its shell; red, orange, yellow, black and pale shades appear in different patterns. The accepted name is Vittina waigiensis. Neritina waigiensis is an earlier combination; taxonomic catalogues also list historical names such as Neritina communis and Neritina elegantina as synonyms. Trade names such as red racer, gold racer and zebra nerite are less precise and may be applied to more than one pattern or species.
Natural habitat
Species and taxonomic sources associate V. waigiensis with the Indo-Pacific, including the Philippines and parts of Indonesia. Aquarium sources describe freshwater and brackish settings and coastal river mouths. Adults graze hard surfaces carrying algae film and biofilm. The life cycle of nerites includes larval development that is not completed in a standard freshwater tank; larvae move toward saltier water. A freshwater aquarium therefore represents conditions for the adult stage, not the complete coastal and river life cycle.
Aquarium and layout
A mature, biologically established aquarium with algae growth on glass, stones and wood matters more than a bare, newly started tank. The species reaches about 3 cm and may climb; a secure lid and closed gaps around hoses help prevent escape. Sources list different minimum volumes, from about 11 litres to around 20 litres. Since these figures conflict and food-bearing surface varies between aquariums, we do not state a fixed minimum. Choose a stable tank with ample grazing area and avoid overstocking. Acclimate the snail gradually to the water conditions.
Water conditions
A species-specific care profile gives 22–28°C and pH 6.5–8.0, noting that a more alkaline pH may benefit the shell. Another aquarium source gives a somewhat higher pH range. Treat stable near-neutral to mildly alkaline water as practical guidance, not a laboratory limit. Avoid persistently acidic, very soft water, which can erode calcareous shells. No exact, independently confirmed GH target was established for this guide. Measure before making changes; do not add calcium or buffer blindly.
Behaviour and group size
The red racer nerite is a peaceful bottom-dweller that moves over hard surfaces and scrapes off growth. It does not require a group. Nerites may climb above the waterline; this can occur, but escape and dehydration should be prevented with a secure lid. A specialist retailer describes the snail as peaceful and plant-safe. Other grazers use the same biofilm. Therefore assess not only temperament, but also available surface, food and water conditions when selecting tankmates.
Feeding
Algae, diatoms and biofilm on stone, wood and glass form the normal food base. A mature aquarium with visible growth often requires little supplemental feeding. A new or very clean tank presents a risk of starvation. A source mentions supplemental foods with high plant content and fresh vegetables; individual snails may not immediately accept dry food. Offer small portions and remove leftovers. Do not assume the snail can keep a tank entirely free of algae: it needs enough natural grazing surfaces and cannot reliably eliminate all growth.
Breeding
Red racer nerites may deposit hard, pale egg capsules on glass, stone or decor. This does not mean a population will develop in freshwater. The larval stage requires brackish or saltier water, so a normal freshwater aquarium generally does not support successful reproduction. Breeding requires a separate suitable larval-rearing setup and food; the reviewed sources do not provide a simple guaranteed protocol. Remove capsules only if unwanted, as they may adhere firmly. Aquatic Arts says commercial breeding is not known for the animals it offers; that is retailer information, not a universal market survey.
Keeping with fish
The snail is not aggressive, but fish that eat snails, pull at the foot or repeatedly knock it over are unsuitable. Small peaceful fish may be considered only if temperature and water chemistry fit and there is no clear predation risk. Controlled trials for every fish combination are unavailable. Also assess adult size, bottom use and food competition, as several animals may rely on the same algae film. Provide multiple hard grazing surfaces and keep the lid closed. Separate animals if a fish continues to harass the snail.
Keeping with other invertebrates
A conditional pairing with the Amano shrimp (Caridina multidentata) may work: stored temperature data overlap at 22–26°C and pH at 7–8. A species-specific source describes nerites generally as peaceful with other invertebrates, but no controlled trial of this exact pairing was found. Both animals may use algae and biofilm, so food competition remains possible in a clean tank. Provide ample grazing surface and observe whether both remain active and obtain enough food. This is a conditional comparison of care data, not proven compatibility.
Exoskeleton, shell and minerals
The snail does not moult like a shrimp, but its calcareous shell grows and can erode under persistently unsuitable water chemistry. Patches, pits or a ragged shell edge may relate to acidic water or insufficient minerals, but appearance alone is not a diagnosis. Measure pH and hardness and check the source water. Change conditions gradually and avoid uncontrolled calcium dosing; with reverse-osmosis water, mineral content should be managed deliberately and measurably. A damaged shell will not immediately recover after a single large mineral addition.
Possible problems
Main risks include starvation in a new or spotless tank, shell erosion in unsuitable water, escape and attacks by snail-eating animals. Confirm that algae film or biofilm is actually available and check the snail regularly. Keep ammonia/ammonium and nitrite at zero and avoid abrupt fluctuations. Copper-based treatments can be dangerous to invertebrates; use medication only after checking its active ingredients and effects on snails. A snail above the waterline may be behaving normally, but make sure it cannot leave the aquarium.
Keeping with other species
Amano shrimp
Suitable with conditionsConditional: verified water ranges overlap at 22–26°C and pH 7–8. A species profile describes the snail as generally peaceful with invertebrates, but no exact-pair trial was found. Both graze; provide ample growth and monitor feeding.
View species profile →Suitable plants
Dwarf Anubias
Suitable with conditions: the species source describes the snail as plant-safe, and verified values overlap with Anubias nana. Attach its rhizome to wood or stone above the substrate. This applies source and database data; it is not a controlled trial.
- Light
- Low, Moderate
- CO₂
- CO₂ injection not needed
Sources & review
This care guide draws on several specialist sources and was last checked on .
View the sources
- World Register of Marine Species / MolluscaBase — WoRMS: Neritina waigiensis accepted as Vittina waigiensis
- GBIF / Catalogue of Life — Vittina waigiensis — Catalogue of Life taxon record
- Aquatic Arts — Red Racer Nerite Snail (Vittina waigiensis) care profile
- Reeflings — Red Racer Nerite species profile
- Wikimedia Commons / Obsidian Soul — Red racer nerite, Vittina waigiensis from the Philippines 01.jpg