Orange Green Shrimp (Neocaridina davidi)

Orange Green Shrimp at a glance

Orange Green Shrimp (Neocaridina davidi) are a selectively coloured form of a small freshwater shrimp from the family Atyidae. Their green body colour can look olive, mossy or brighter under different lighting, backgrounds and stages of maturity. They are best chosen for the quiet detail they add to a mature aquarium: grazing over hardscape, picking at established surfaces and moving between plants rather than behaving like an instant cleaning crew.

This product follows the supplier identity Neocaridina davidi with the trade colour description orange green. The accepted species name is Neocaridina davidi; the colour words stay outside the scientific name because they describe the offered line rather than another species. The dispatch size is 1–1.5 cm. That is the size supplied, not the adult size. A species summary records adults at approximately 3–4 cm, so plan the aquarium around a grown group rather than the small arrival size.

What one purchase includes

Sex is guaranteed only when the selected option explicitly states male or female. This Orange Green Shrimp listing has no sex-guaranteed option.

A single shrimp can be added only where the existing group, tank capacity and compatibility already make sense. For a new group, OATA's broad care guidance recommends at least five social shrimp. Tropical Fish Co uses a mature, filtered 20-litre aquarium as a cautious starting policy for a small Cherry Shrimp group, above OATA's general 10-litre screen for small shrimp. Neither figure is a permanent shrimp-per-litre formula, and a community aquarium needs more room once fish, snails, feeding area and possible juvenile survival are considered.

Who this shrimp suits

The orange-green colour is a line description, not a promise that every animal will show the same shade under every lamp or substrate. Natural variation is part of live-animal keeping. Gallery images have been digitally enhanced to improve image quality. Natural colour, pattern, size and maturity can vary between live animals.

For a fuller explanation of species care, water decisions and breeding boundaries, read the Cherry Shrimp Care Guide. To compare other colours without treating them as automatic companions, browse the current cherry shrimp collection.

Decide what you want the aquarium to achieve

A mixed display, a shrimp-only colony and a single-colour breeding project are different plans. In a mixed display, the main questions are adult fish predation and feeding access. A colony project adds protected intakes, dense cover and space for juveniles. A colour-line project also needs separation from other Neocaridina if maintaining the orange-green appearance matters.

• Write down the aquarium's measured temperature, pH and hardness.
• List every adult companion, not only the animals that are small today.
• Choose whether seeing adults or retaining juveniles is the priority.
• Check that several shrimp can feed without crossing an exposed area.
• Reserve a safe alternative home before a compatibility problem occurs.

That short plan prevents the animal's small dispatch size from hiding the real work: stable water, mature surfaces, suitable group care and patient observation.

Build a mature, shrimp-safe aquarium

A successful shrimp aquarium begins with biological maturity, not a calendar date. A tank that has been running for a certain number of weeks is not automatically ready. The filter must be able to process the aquarium's actual waste, and water tests should show zero ammonia and zero nitrite before livestock is added. Stock gradually so the bacterial population can respond to each increase in feeding and waste.

The RSPCA explains the essential role of a working biological filter: toxic ammonia is converted to nitrite and then to the safer end product nitrate. Shrimp add less individual waste than large fish, but their small size does not make them immune to an immature system. A filter problem, overfeeding or a dead hidden animal can still change water quality quickly, particularly in a small volume.

Start with stability and usable space

Tropical Fish Co's cautious policy starts a small Cherry Shrimp group in 20 litres of mature, filtered water. OATA gives 10 litres as a broad minimum screen for a group of small freshwater shrimp or snails. The extra volume in the store policy offers more headroom for equipment, feeding mistakes, summer heat and routine maintenance. Neither number tells you how many shrimp a tank can hold permanently.

Usable space matters alongside litres. Substrate, wood, rock, filter housings and a low water line all reduce the nominal volume. On the positive side, carefully chosen hardscape and plants create grazing surfaces and sheltered routes. Plan enough open access to inspect the animals and clean equipment without dismantling the whole aquarium.

• Use a filter with a fine guard or suitable sponge over any intake that could trap a small shrimp or newly hatched juvenile.
• Provide aquarium-safe wood, rock, mosses or plants that create textured surfaces and cover.
• Keep heavy hardscape stable so maintenance cannot cause a collapse.
• Leave viewing routes through the aquascape so missing, injured or poorly feeding shrimp can be noticed.
• Use a secure cover where the aquarium design presents escape gaps, while leaving ventilation and cables safe.
• Prepare a backup container or separate mature aquarium if a companion becomes predatory or a treatment cannot safely be used with invertebrates.

Established biofilm is valuable because it creates continuous picking opportunities between meals. It is not a substitute for a complete diet, and a tank looking old or green does not prove that it is chemically safe. The useful combination is mature filtration, measured water, established surfaces, deliberate feeding and predictable maintenance.

Cycle and stock without rushing

Before adding the group, test ammonia and nitrite and review nitrate in relation to the source water. Check that the filter flow is normal, the heater or room temperature is stable and any tap water has been treated for chlorine or chloramine. Add animals gradually rather than increasing the biological load and feeding heavily on the same day.

The OATA freshwater aquarium guide recommends regular testing and gradual stocking. Its general setup principles are useful, while the exact water and social advice on this page is kept in shrimp context. If you are preparing your first invertebrate aquarium, the freshwater shrimp setup guide turns those priorities into a practical sequence.

Water values, maintenance and gradual change

OATA's guidance for freshwater shrimp and snails gives 17–27°C, pH 6.5–8.0 and 4–18 dGH. These are useful first screening values for the group, not a controlled species-specific optimum for this colour line. The practical task is to compare the measured source water with the aquarium, choose a stable point within suitable guidance and avoid abrupt changes.

Temperature affects oxygen, metabolism, feeding and reproduction at the same time. Do not heat automatically because the animal is sold as tropical; measure the room and aquarium through a normal day. A cool room may need a correctly sized, thermostatically controlled heater, while a warm room may need an overheating plan and improved gas exchange. Keep equipment guarded so a shrimp cannot rest directly against an unsafe surface.

pH and hardness deserve the same measured approach. UK tap water varies between supplies, and aquarium substrate, rocks, top-ups and water changes can shift the result. Test the aquarium itself rather than assuming a postcode or a water-company average describes the tank. The aquarium water parameters guide explains what each measurement means, and the water matcher helps compare a real set of readings with the stated guidance.

A repeatable weekly routine

OATA strongly recommends a 25% partial water change at least weekly for freshwater shrimp and snails as a broad routine. Treat that as a starting schedule to be adjusted from test results, stocking, feeding, plant growth and source-water chemistry. Condition replacement tap water before it enters the aquarium, and match temperature closely enough to avoid a sudden swing.

1. Observe the shrimp before disturbing the tank: note activity, feeding, colour and any unusual hiding.
2. Measure temperature, ammonia and nitrite; review nitrate and the trend from earlier tests.
3. Remove visible waste and recurring uneaten food without stripping every grazing surface clean.
4. Change the planned amount with conditioned water, adding it steadily rather than creating a sharp temperature or chemistry change.
5. Check the filter for reduced flow. Rinse dirty media lightly in removed aquarium water when cleaning is necessary; do not rinse filter media under tap water.
6. Inspect the intake guard, heater guard, lid and hardscape before finishing.
7. Record anything unusual so several changes are not made at once without knowing which one helped.

A stable tank is not one whose numbers never move by a decimal point. It is one where changes are understood, gradual and compatible with the animals. Chasing a pH reading with repeated chemical corrections can create more stress than choosing a suitable steady value and maintaining it.

What to watch between maintenance days

Learn the group's normal pattern. A healthy shrimp may spend long periods grazing, retreat while moulting or explore new food, but a whole-group change deserves attention. Reduced feeding, unusual stillness, frantic movement, repeated attempts to leave the water, widespread pale colour or several animals gathering at unusually high-flow areas can justify immediate water and equipment checks.

Read trends across the whole aquarium

A test result is most useful when it can be compared with an earlier one. Record the date, time, temperature and recent maintenance so later readings have context. If nitrate begins rising more quickly after the group grows or feeding increases, review portions, waste removal, plant growth and water-change frequency together rather than changing several unrelated things at once.

Top-ups and water changes have different jobs

Topping up replaces evaporated water but leaves many dissolved substances behind. Repeated top-ups can therefore change mineral concentration. A partial water change removes some dissolved waste and replaces part of the water chemistry. Keep both actions deliberate, condition new tap water, and recheck the aquarium after changing source water, substrate or stone.

Small shrimp also depend on equipment consistency. Check that a heater is not creating a very hot corner, that a sponge has not clogged enough to reduce flow and gas exchange, and that plant growth has not sealed the surface. In summer, measure the warmest daily temperature rather than relying on the heater setting. During cold weather, confirm the aquarium itself remains stable instead of treating an indicator light as proof.

Make one change, then observe

Records do not need to become complicated. A notebook with readings, water-change volume, food changes and a brief observation is enough to show whether a problem is sudden or gradual. That distinction is valuable when deciding whether the priority is an emergency water-quality response, equipment repair, feeding adjustment or patient observation.

Feeding, moulting and health decisions

Neocaridina davidi are omnivorous grazers. In an aquarium they pick at biofilm and soft growth, but they still need an appropriate complete shrimp food. Algae alone is unpredictable in quantity and nutrition, while heavy feeding can foul the very water the shrimp depend on.

Feed the group you can see

Use a complete sinking shrimp food as the nutritional base, following the product instructions and adjusting to the group, temperature and other animals. Suitable variety can be offered carefully, but every addition should have a clear purpose and be removed if it remains uneaten. A feeding dish can make leftovers easier to see, although timid animals must still be able to reach food away from bold competitors.

• Place food where more than one shrimp can approach without crossing an exposed area.
• Watch whether each animal can feed, especially after adding fish or larger invertebrates.
• Reduce the next portion when food repeatedly remains after the group has lost interest.
• Do not increase food merely because the glass looks clean; inspect wood, leaves and other grazing surfaces too.
• Use water-test trends and body condition alongside appetite when judging the total ration.
• Avoid assuming that a colour-enhancing product can correct genetics, stress, poor water or inappropriate lighting.

Shrimp are sometimes marketed as algae eaters, but they do not guarantee control of a named algae and they do not remove the need for normal cleaning. If algae is increasing, investigate light duration, nutrients, feeding and maintenance. Add shrimp because their care and behaviour fit the aquarium, not as a disposable treatment for a maintenance problem.

Moulting and mineral context

Growth requires the old exoskeleton to be shed. A moult can be mistaken for a dead animal, and a recently moulted shrimp may hide while the new shell hardens. Keep water chemistry and diet steady; sudden changes made in response to one shell may create a larger problem. Hardness describes part of the dissolved mineral picture, but a single dGH result does not diagnose a moulting issue by itself.

When a shrimp appears unwell, begin with observations that can be verified. Measure temperature, ammonia and nitrite; review nitrate, pH and hardness in context; confirm filter flow and gas exchange; then list recent changes such as new plants, animals, decor, aerosols, foods or treatments. Clear photographs and a short timeline are more useful than trying several medicines at once.

Medicines and copper

Freshwater shrimp are sensitive to copper exposure. Read the complete current label and every invertebrate warning before any aquarium treatment is used. A product being sold for fish does not make it suitable for shrimp, and this page does not set a universal safe concentration. If treatment is necessary and the label is unclear, obtain suitably qualified advice and use a separate mature system where appropriate.

Do not dose preventively on the basis of colour change, hiding or a single white mark. Similar-looking signs can have different causes, including normal moulting, injury, water quality, stress and organisms that require different responses. Isolate decisions, keep records and protect the rest of the aquarium from unnecessary exposure.

Breeding without promises

Females carry eggs beneath the abdomen, and Neocaridina davidi young hatch as benthic juveniles rather than needing the prolonged saline larval stage associated with Amano Shrimp. That biology can make aquarium reproduction possible, but it does not promise a colony. The offered shrimp has no guaranteed sex, and one purchase cannot be treated as a guaranteed breeding unit.

If colony growth is the aim, prioritise a mature filter, protected intakes, dense cover, suitable food and freedom from fish predation. Plan for the opposite outcome as well: a successful group can increase the feeding load and available grazing pressure. Avoid promising a fixed maturity age, egg count, incubation time or monthly population increase because temperature, lineage, sex mix, food and survival all vary.

Compatibility and colony goals

Compatibility starts with the outcome you want. A display where a few adult shrimp coexist with fish is different from a colony intended to retain newly hatched juveniles. No fish can be guaranteed safe for shrimplets. OATA's broad guidance says freshwater shrimp should not be mixed with fish able to fit them in the mouth or with species known to be predatory.

Screen companions by behaviour and scale

Use adult size, mouth size and feeding behaviour, not a peaceful label alone. A fish may ignore adult shrimp yet hunt juveniles, or it may become more interested after discovering a moulted animal. Territorial behaviour, fast feeding and constant disturbance can also reduce shrimp access to food without obvious predation.

Other Neocaridina may share broad care needs, but mixing colour lines can change the appearance of future generations and can spread health issues between groups. Snails also require their own species checks, feeding space and water plan. Neither category should be called universally suitable.

Shrimp-only aquariums

A shrimp-only aquarium removes fish predation but not every risk. Intake design, overfeeding, population growth, unstable water, treatments and new-animal biosecurity still matter. It can be the clearest choice when juvenile survival or preservation of one colour line is the goal because feeding access and behaviour are easier to observe.

Quarantine and observation should be practical rather than theatrical. Use dedicated wet equipment where possible, avoid moving shop or transport water into the display, and observe new animals closely. There is no single home quarantine duration supplied here; the important controls are separation, clean equipment, records and a response plan.

Arrival and first observations

Prepare the aquarium and test it before the delivery day. Follow the current arrival guidance for the order and compare the bag water situation with the established aquarium rather than using one universal drip time for every journey. Gradual change is the goal, but the appropriate method depends on bag condition, temperature and chemistry.

• Confirm the filter, intake guard, temperature and cover before opening the parcel.
• Observe the sealed bag and the animals before transfer.
• Keep transport water out of the display where the supplied method advises.
• Watch the whole group after introduction, including shy animals and feeding access.
• Test water promptly if several shrimp become inactive, restless or unusually pale.
• Keep the separation plan ready if a companion begins hunting.

Never release shrimp, aquarium water, plants or equipment contents into natural waterways. Rehome responsibly or use an appropriate disposal route, keeping non-native animals and pathogens away from the environment.

Questions keepers ask before ordering

How big do Orange Green Shrimp get?

The species summary records adult Neocaridina davidi at approximately 3–4 cm. That adult record is separate from the 1–1.5 cm dispatch size and does not divide the result by sex or colour lineage.

What size aquarium do Orange Green Shrimp need?

Tropical Fish Co uses a mature, filtered 20-litre aquarium as a cautious starting policy for a small group. OATA gives 10 litres as a broad screen for small freshwater shrimp; neither figure is a permanent shrimp-per-litre formula, so allow more room for companions and population growth.

How many Neocaridina davidi should be kept together?

OATA's broad social guidance recommends at least five shrimp. Plan the group around mature filtration, grazing area, feeding access and future juveniles rather than multiplying the aquarium volume by a fixed density rule.

Are Orange Green Shrimp suitable for beginners?

They receive an intermediate store care assessment. Their small size is manageable, but a keeper still needs a biologically mature filter, measured water, protected intakes, appropriate food and the confidence to avoid rapid changes or unsuitable medicines.

What do Orange Green Shrimp eat?

They graze biofilm and soft growth, but should receive an appropriate complete shrimp food rather than relying on algae alone. Feed measured portions, make sure the whole group can reach them and remove recurring leftovers before they affect water quality.

What temperature and pH do Neocaridina davidi need?

OATA's broad freshwater shrimp guidance gives 17–27°C, pH 6.5–8.0 and 4–18 dGH. Use those figures as a group-level planning screen, compare measured source and aquarium water, and make any necessary change gradually.

Are Orange Green Shrimp aggressive or likely to nip fins?

They are peaceful grazing crustaceans rather than fin-nipping fish. Their main community risk runs the other way: fish may swallow adults or juveniles, while fast companions can outcompete them at food.

Which animals can live with Neocaridina davidi?

Avoid fish that can fit shrimp in their mouths and species known to be predatory. Other shrimp or snails still need matching water, food and health checks, and no fish can be promised safe when newly hatched juveniles matter.

How do Orange Green Shrimp arrive alive in the UK?

Tropical Fish Co hand-packs live animals in oxygenated bags, an insulated box and a heat pack when weather calls for it, using a licensed live-animal courier. Read the current delivery and Live Arrival Guarantee policy; for a claim, contact the team the same day with the order number and a continuous unboxing video that begins with the parcel sealed and shows the animal in the bag.

Care and identity references

The identity and care figures above are kept in their original scope so a dispatch measurement is not confused with adult growth and broad trade guidance is not presented as a laboratory optimum.

• World Register of Marine Species: accepted name Neocaridina davidi and family Atyidae.
• Species summary for Neocaridina davidi: native range, omnivory, colour forms and approximate 3–4 cm adult record.
• OATA freshwater shrimp and snail care sheet: broad group-level water, social, feeding and maintenance guidance.
• OATA freshwater aquarium setup guide: cycling, testing and gradual stocking principles.