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King Koopa Nerite Snail (Neritina juttingae)

King Koopa Nerite Snail (Neritina juttingae)

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Descripción
Freshwater Snails

King Koopa Nerite Snail

An uncommon Nerite species with rounded horn-like protrusions distributed across a dark olive-to-gold shell -- one of the most visually distinctive freshwater snails in the hobby, and an exceptional algae grazer.

Rounded Horn-Like Shell Protrusions Dark Olive-to-Gold with Black Markings Cannot Breed in Freshwater Uncommon Species Continuous Algae Grazer Shrimp Safe

King Koopa Nerite Snails (Neritina juttingae) are an uncommon Southeast Asian Nerite species named for the rounded, horn-like protrusions distributed across the shell surface -- an arrangement that gives the snail a silhouette resembling a sea mine and earns its nickname from the spiky-shelled video game villain. The shell base colour ranges from dark olive and brown to warmer gold tones, overlaid with black markings and banding that vary in pattern between every individual. No two King Koopa Nerites look exactly alike -- the number, size, and arrangement of the horn protrusions, combined with the unique black marking pattern on each snail, makes every specimen genuinely individual. They are less commonly available than Zebra or Olive Nerites, and their unusual appearance makes them one of the most conversation-worthy invertebrates in the freshwater hobby. Algae-grazing performance is consistent with other Nerite species -- continuous, broad-spectrum, and highly effective. Cannot breed in freshwater. Fully safe with all shrimp. Shell requires GH 6+ and a pH above 7.0 for best long-term shell health.

Horns, Shell & Colour

Rounded horn-like protrusions across the shell surface -- the defining feature of the species -- the horns of the King Koopa Nerite are rounded and blunt-tipped rather than the sharp, spine-like projections of the Sun Thorn Nerite. They are distributed irregularly across the shell surface in varying numbers and sizes, giving each snail its characteristic sea-mine silhouette. The horns are a natural structural feature of the shell and are prone to occasional minor breakage during normal activity, which does not harm the snail. The rounded horn profile gives the King Koopa a more armoured, prehistoric appearance than the sharper-spiked thorn Nerites. Dark olive-to-gold base with variable black markings -- unique pattern on every individual -- the shell base colour ranges from dark olive-green and brown in some individuals to warmer golden-tan tones in others. Across this base runs a pattern of black markings, banding, and blotching that is entirely unique to each snail -- no two King Koopa Nerites share the same distribution of black against the base colour. This individual variation makes each snail a genuinely one-of-a-kind specimen, and a group of three to five in the same tank will display noticeably different patterning from one to the next. Up to 1 inch at maturity -- larger and more visible than many Nerite species -- King Koopa Nerites reach approximately ¾ to 1 inch in shell diameter at maturity, making them clearly visible at normal tank-viewing distance. The combination of size, horn structure, and individual patterning gives them a presence in the tank that smaller or smoother Nerite species do not achieve. Uncommon in the hobby -- less frequently available than Zebra, Olive, or Tiger Nerites -- King Koopa Nerites are not as widely bred or distributed as the most common Nerite species and are less reliably available from general aquatic retailers. When available they are among the most sought-after Nerite variants for aquarists who want both effective algae control and a genuinely unusual display invertebrate.

Grazing & Husbandry

Exceptional broad-spectrum algae grazer -- consistent with other Nerite species -- King Koopa Nerites graze continuously across glass, hardscape, driftwood, plant leaves, and substrate, consuming algae films, biofilm, cyanobacteria, and fine organic deposits. They are particularly effective on glass surfaces and smooth hardscape. In a well-established tank with adequate algae and biofilm growth they require no supplemental feeding; in newer or heavily stocked tanks supplement with algae wafers or blanched vegetables. Cannot breed in freshwater -- population is completely stable -- like all Nerite species, King Koopa Nerites require brackish or marine water for their larvae to develop. Egg capsules -- small, hard, white oval dots -- may be deposited on hardscape, glass, and plant surfaces but will not hatch in freshwater. You will never have more King Koopa Nerites than you introduce. Prefers alkaline water -- pH above 7.0 for best long-term shell health -- King Koopa Nerites are more sensitive to acidic water than some other Nerite species. In water below pH 7.0 the shell is prone to erosion over time, gradually thinning the base shell and degrading the horn structure. Maintain pH above 7.0 and GH 6+ consistently. Standard Neocaridina parameters are ideal. Not recommended for Caridina tanks with low pH and soft water. Keep water line low or cover the tank -- Nerites climb readily -- King Koopa Nerites climb above the waterline and will exit the tank through any gap. Keep the water line at least 5–7cm below the rim or use a fitted lid. A snail found outside and returned promptly recovers; one left out for more than a few hours will not. Fully safe with all shrimp at every life stage -- peaceful and non-predatory. Compatible with all Neocaridina and other shrimp species without concern.
Keeper's Note

A single King Koopa Nerite foraging slowly across the front glass or foreground hardscape of a shrimp tank consistently draws more attention and comment than almost any other invertebrate in the tank -- the horn structure, the individual patterning, and the sheer unusualness of the snail's silhouette make it one of those tank inhabitants that visitors always ask about first. If the goal is a shrimp tank that functions well and also generates genuine interest, a small group of two to three King Koopa Nerites achieves both without competing visually with the shrimp themselves.

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Browse more freshwater snails

Explore Sun Thorn Nerites, Mystery Snails, and more. Browse our full Freshwater Snails collection.

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Before placing your order, please review our DOA Policy Shipping Info
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Policies & Disclaimers
Before you order · Snails

Policies & Disclaimers

What to expect from your snails, how our guarantee works, and what to do when your order arrives.

Size & appearance

Snail size varies by species and individual. Refer to the listing and selected option for any stated purchase size. Adult or maximum sizes in care information describe growth potential, not a guaranteed size on arrival. Photos represent the species or color variety rather than the exact animals you will receive.

Shells, colors & markings

Shell shape, color, pattern and body coloration vary between individuals and with age. Lighting and aquarium conditions can affect how colors appear. Follow the mineral and water requirements in the species listing to support shell health. Photograph any concerning shell damage on arrival and report it promptly under the Live Arrival Guarantee.

Inactivity after shipping

Snails may remain withdrawn or inactive after shipping and can take several days to settle. Lack of movement alone does not confirm that a snail has died. Do not force a snail out of its shell. If you are concerned about its condition, photograph the unopened packaging and email us within two hours of the carrier’s recorded delivery time. Report the concern promptly even if the snail may simply be inactive; waiting several days does not extend the claim window.

Reproduction & eggs

Reproductive behavior differs by species. Some snails can reproduce readily in freshwater; others have different requirements for successful reproduction. Egg laying is not the same as successful hatching. Read the species listing before purchase rather than assuming all snails will, or will not, reproduce in your aquarium. We do not sex snails. No particular sex, male-to-female ratio or breeding pair is guaranteed.

Feeding & compatibility

Snails have different diets and habitat requirements. Do not assume every species eats algae or can live on algae alone. Assassin snails prey on other snails and are not suitable companions for a collection of ornamental snails. Use the care and compatibility information for the specific species, and check that tankmates will not injure or eat it.

Recognizing activity without forcing a response

A snail may stay retracted after shipping or become active when you are not watching. Some species have a shell door, called an operculum, while others do not; a closed shell or an unfamiliar resting position is not enough by itself to identify a loss.

Do not pull on the body, pry a shell door open or repeatedly handle a snail to make it move. If its condition concerns you, document the unopened bag and contact us within the two-hour window. The possibility of delayed activity does not change the policy’s deadline or turn an unconfirmed loss into an approved claim.

Shell appearance & damage documentation

Shell patterns, growth lines, surface texture and body colors vary with species and age. A photograph of one individual cannot show every pattern you might receive. Natural variation and a concern about physical damage are different questions.

Photograph cracks, chips, erosion or other areas that worry you, together with a wider view and the shipping label. Do not scrape, polish or alter the shell to improve the photo. Report concerning arrival damage promptly rather than assuming it must be accepted or automatically qualifies for a particular resolution.

For ongoing shell health, follow the species’ water and mineral requirements. Measure your water before adding supplements, and avoid treating all snail species as having identical needs.

Eggs, young & population expectations

We do not sex snails, and packs are not assembled to a male-to-female ratio. Snail reproductive biology varies: some species have separate sexes, while others have both reproductive functions. Do not interpret an unsexed pack as a promise that breeding cannot occur.

Ramshorn and bladder snail populations can grow in freshwater, particularly when food is plentiful. Nerites may leave eggs on hard surfaces even though successful development has different requirements from the adults’ freshwater habitat. Check the individual species rather than assuming every egg will hatch or that every snail reproduces in the same way.

A group is not a guaranteed breeding colony. The number and appearance of offspring, or the absence of eggs, cannot be predicted from representative product photos.

Feeding, predators & acclimation

Match the diet to the species. Grazing snails still need an adequate food supply, and an apparently clean aquarium may not provide enough natural grazing. Predatory species such as assassin snails have different feeding and compatibility needs from algae grazers.

Keep ornamental snails away from animals likely to bite their exposed bodies or damage their shells. Follow the specific species’ habitat and acclimation guidance, and check that any treatment used in the aquarium is appropriate for snails.

Quarantine or separate observation can help you inspect new arrivals and their behavior before adding them to an established aquarium. It is care guidance, not an extra claim requirement; follow the arrival documentation rules before transferring animals.

Bonus animals & your paid count

When inventory allows, our policy provides one bonus animal for every five ordered of the same species. Bonuses are discretionary and are not separately covered for refund or replacement. They count toward the total arriving alive when assessing whether your paid quantity was fulfilled.

For example, if you order 10 snails and receive 12, receiving 11 alive fulfills the paid count. If fewer than 10 arrive alive, the shortfall is assessed under the guarantee. Expected bonuses that were not included are not a paid-item shortage.

Checking quantities & reporting a short count

Check the actual animals received against your paid order quantity. For a suspected short count, the full policy calls for a clear counting photo showing all animals, the empty bag and the shipping label before they are introduced into an aquarium. Follow its counting instructions and contact us if you cannot document the count clearly.

Verified miscount claims are resolved with a refund for the missing paid animals under the current policy. A count made after release can be unreliable when animals hide among plants or hardscape.

Before opening: photographs & your first report

Use the email address on the original order and include all arrival concerns in the initial message to support@superiorshrimpaquatics.com within two hours of the carrier’s recorded delivery time. Photograph the sealed bag, visible and countable animals, shipping label, box and packing materials.

If the bag is leaking or damaged, photograph the leak or damage and wet packing before opening. Keep the original photographs and packaging. For cloudy water that prevents counting, take the original cloudy-water photo first and follow the full policy’s specific additional clear-container documentation instructions.

The guarantee contains restrictions on opening bags, acclimation and transfers. Review those instructions before taking action so the evidence needed to assess the claim is preserved.

Arrival problem? Document it promptly.

Email support@superiorshrimpaquatics.com within two hours of the carrier’s recorded delivery time, using the email address on your order.

  • Photograph the original sealed bag with the animals visible and countable.
  • Include the shipping label, outer box and packing materials.
  • Document any bag damage or leakage before opening.
  • Report all arrival losses in your initial message.

Read the full guarantee for photo requirements, cloudy-water documentation and claim eligibility before opening or transferring animals. Approved claims are resolved under the options and conditions stated there.

Shipping & coverage limits

Ground shipping carries increased risk for live animals, and the policy reserves the right to refuse guarantee claims on ground shipments. Choose your shipping method carefully.

The guarantee applies to the first delivery attempt. Redirection, pickup holds and carrier delays can affect eligibility under the full policy. Any product-specific coverage restrictions stated in a listing also apply.

Hitchhikers & quarantine

Live aquatic products can carry tiny hitchhikers or eggs despite inspection. Pest-free arrival is not guaranteed. We recommend quarantining new arrivals before introducing them into an established aquarium.

Returns

Care guidance in this tab does not create additional guarantee requirements or exclusions. Please read the full policies for complete eligibility, documentation, resolution and return requirements.

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