What species is a cherry shrimp?

Evidence review: August 12, 2026

The aquarium shrimp commonly called cherry shrimp is generally maintained and sold as Neocaridina davidi (Bouvier, 1904). Older papers and listings may call the same taxon N. heteropoda, N. denticulata davidi or N. denticulata sinensis. Those names are useful search terms, but a red, blue or orange body does not identify a specimen to species.

Use the anatomy map for orientation, not as a one-character taxonomic key.

A peer-reviewed UF/IFAS Extension profile is useful for understanding common public labels. It lists cherry, orange sakura, yellow sakura, green jade, Blue Dream, blue velvet, blue jelly and rili as examples used around N. davidi.¹¹ That list is not a lineage chart. The profile reports no crosses, pedigrees, genetic tests or stable definition that makes two same-named seller stocks equivalent.

The current three-page profile is a species overview, not an aquarium parameter sheet. It contains no recommended temperature, pH, GH, KH, conductivity, TDS, ammonia, nitrite, nitrate, stocking density or feeding amount. Its general size, incubation, maturity, molting and water-cleaning statements do not become universal care rules merely because the publisher is an extension service.

One animal can carry several different labels

Write the claims separately. "Sold as Sunkist Orange N. davidi by seller X on this date" preserves what is known. "This is genetically pure Sunkist" turns a trade label into evidence it cannot supply.

Why the current name still has an asterisk

A 2024 study examined three forms from the Baiyangdian drainage area. The forms differed subtly in the third walking leg and first and second pleopods, but their mitogenomes, genetic distances and phylogenetic placement led the authors to propose combining N. davidi, N. denticulata denticulata, N. d. sinensis and N. heteropoda as one species retained under the name N. denticulata.²

DecaNet has not adopted that combination. Recent integrative work in Japan also retained N. davidi and N. denticulata as separate species, and published debate continues over the identity of some Japanese lineages.³ This is why a responsible page reports both the authority it follows and the competing result. "The name changed in 2024" is too certain.

Why colour and one phone photo are not enough

Taxonomic studies have used combinations of rostrum shape and dentition, proportions and spines on walking legs, the male first pleopod and other reproductive structures. Modern studies may add COI barcodes, complete mitochondrial genomes or other molecular data.³⁴ A strongly pigmented aquarium animal, a juvenile or a female may hide or lack a character required by a key.

Morphology is not a magic answer either. A study of 1,200 freshwater shrimp in Henan found substantial individual variation in rostrum length, shape and teeth, sometimes beyond ranges in earlier descriptions, and combined morphology with COI evidence.⁴ Identification is a documented comparison, not a confidence contest.

Ten market barcodes do not certify a trade line

A 2023 study sampled ten ornamental shrimp entries from one Central Java market. The visible labels included red, black, white, mixed blue-black and yellow forms. The authors sequenced an approximately 545-base-pair CO1 fragment and reported that the ten table entries had 98.24 to 99.29 percent identity to the same Chinese N. denticulata mitochondrial reference. They also reported zero pairwise distance among the sampled entries.⁷ This is useful evidence that those visible colours did not separate into different reported CO1 groups in that sample. It does not mean colour identified the species.

The paper does not report vouchers, a morphological key, new public sequence accessions, seller or aquarium clustering, replicate extractions or PCR controls. Its blue gel lane has no band, while the sequence table has no standalone blue entry and uses a different sample count sequence. The tree is described with a Jukes-Cantor model, but the distance table is labelled Kimura 2 parameter. A short maternally inherited marker from ten market specimens cannot certify Blue Dream, Sunkist, pedigree, purity, hybrid status, inheritance or another seller's stock.

Another Neocaridina species is not a colour morph

Shih, Cai and Chiu described Neocaridina fonticulata from Sheding, Kenting, southern Taiwan using deposited type material, comparative morphology and mitochondrial COI evidence.¹² The diagnosis uses the rostrum, walking legs and male first and second pleopods. Those are specimen characters, not trade colours. A translucent, blue-tinged or spotted shrimp in a photograph is not therefore N. fonticulata.

Four source shrimp supplied a 658-base-pair COI segment and one reported haplotype, LC427866. That sampled mitochondrial result supports the published species treatment alongside morphology, but it is not a universal barcode cutoff, nuclear ancestry test, reproductive-isolation experiment or named-line certificate. Several diagnostic characters also require an adult male and specialist examination. "Looks like" must stop short of species certainty when those observations are unavailable.

The paper then knew the species only from its Sheding locality. About 25 C, pH 7.06 to 7.16 and dissolved oxygen 7.33 to 7.70 mg/L describe the reported collection-site context. They were not assigned treatments or a temporal habitat survey, so they are not aquarium targets, tolerances or an instruction to copy one spring. The live-colour photographs were made after collection for observation, not as a husbandry trial.

An identification character can change with season

The 2006 description of Neocaridina iriomotensis listed 91 specimens from seven collection dates at one upper Nakama River locality on Iriomote Island.¹³ Its diagnosis used a combination of rostrum, pterygostomian spine, walking-leg proportions and male pleopods. This was a much stronger workflow than matching body colour.

One result is especially useful for community identifications: the third walking leg showed a sex-associated form in the summer specimens, but no sexual difference in the winter specimens. A character can therefore be real in the source and still be unavailable in another season. Exact identification should use a combination of appropriate characters, life-stage and collection context rather than treating one feature as a permanent password.

The authors also reported nearby headwater forms with intermediate rostrum lengths and called them tentative ecomorph populations pending molecular and ecological work. The paper itself contained no molecular analysis. It described slow water, aquatic vegetation and tree roots, but reported no temperature, pH, hardness, conductivity, dissolved oxygen or nitrogen measurements. Its 21-to-82 clutch range also lacks female and clutch denominators. None of those observations supplies a water recipe, population estimate or breeding forecast.

Old names in research are not errors to erase

Search both N. davidi and N. heteropoda when reviewing the literature. A paper published under an older name retains that name in its title and citation. In prose, we identify the study name on first use. That keeps the source findable and prevents a later taxonomic decision from being projected backward into the experiment.

This matters because species identity affects what can be generalized. A result for one research colony does not automatically describe every aquarium line, and a result for another Neocaridina species is not secretly a cherry-shrimp trial because the animals look similar.

A Neocaridina title can still be a false positive

A 1985 Hong Kong field paper named its Lam Tsuen River population Neocaridina serrata and reported seasonal abundance, temperature, maturity, longevity and clutch observations. A later taxonomic revision examined Lam Tsuen material and reassigned that population to Caridina cantonensis. The revision also concluded that neither C. cantonensis nor C. serrata belongs in Neocaridina.⁹

Keep the original title intact so readers can find it, but do not use its field results as evidence for N. davidi. The population's temperature, longevity and reproduction observations are not Neocaridina aquarium limits or calendars. This is why a title search is a discovery tool, not a species identification method.

Trade names are inventory labels, not family trees

• The same trade name from two sellers does not prove shared ancestry.
• Two different trade names do not prove different ancestry or species.
• A genus label does not prove two animals can or cannot hybridize.
• A grade describes observed appearance under a method, not genetic purity.
• A colour-line chart without documented crosses is a hypothesis, not a pedigree.

Keep a newly acquired source population separate through quarantine and its first breeding records. If two sources are later combined, call that a documented merge or outcross. Do not imply that matching labels made them one line on arrival. See the colour and crossing guide.

Range is also an identification claim

Sources commonly place N. davidi in China, Korea, Taiwan and Vietnam, but exact native and introduced boundaries depend on the taxonomic treatment and specimen evidence used. A Taiwan study that combined morphology and COI found four Neocaridina species on the island, including widespread N. davidi, rather than treating every similar shrimp as one taxon.⁵ Name the study, place and identification method instead of copying a range map without its assumptions.

Introduced populations have been documented far from the reported native range. A year of field sampling in eastern Japan treated its Tomoe River population as invasive N. davidi.⁶ That occurrence does not define an aquarium temperature, lifespan or water recipe. It does show why shrimp, plants, tank water, filter media and substrate must never be released outdoors. Rehome unwanted animals or obtain species-appropriate humane disposal guidance from an aquatic veterinarian or relevant local authority. Use the responsible placement and no-release guide.

A thermally affected canal in Poland produced 15 shrimp in three positive collection years spanning 2003 to 2017. Morphology and seven field COI sequences supported N. davidi identity, and one ovigerous female was collected in 2013.¹⁰ This supports repeated occurrence and possible persistence. It does not prove cold tolerance or continuous establishment: the canal received heated power-station water, no winter temperature was reported, most collection effort was not standardized and the authors retained repeated introductions as an alternative.

The study's field and amateur-aquarium COI sequences shared one mitochondrial haplotype. That similarity cannot identify a seller, source colony, release event, nuclear ancestry or direction of transfer. A field record strengthens the case for containment. It never makes outdoor release safe.

A 2024 Brazilian report adds a narrower occurrence record. Three coastal trawls yielded one live adult female, which was deposited as voucher CCDB 6963 and identified with morphology plus COI, 16S, 18S and H3 evidence.⁸ That is strong evidence for the identity and occurrence of one animal. It is not evidence of an established or reproducing Brazilian population, marine tolerance or a salinity-acclimation limit: the study reported no ambient salinity, survival observation, second specimen or sampling of the nearby lagoon and estuary.

An aquarium-trade introduction was proposed as a possible route, not directly tested. Zero COI distance from selected Polish and Canadian sequences cannot identify a European source, seller, release event or aquarium lineage.

What the evidence does not prove

• That every cherry-shrimp listing contains a taxonomically examined animal.
• That all named aquarium lines descend from one documented source population.
• That a photo or colour establishes species, ancestry or genetic purity.
• That one market's ten CO1 entries authenticate a global trade name or lineage.
• That the 2024 proposed synonymy is already the accepted registry treatment.
• That a paper with Neocaridina in its historical title necessarily studied that genus.
• That a field occurrence establishes a home-aquarium care boundary.

Sources and taxonomic authority

1. DecaNet editors. Neocaridina davidi (Bouvier, 1904), AphiaID 1579333. World Register of Marine Species. Authority record reviewed August 10, 2026.
2. Yang et al., 2024. Integrative Taxonomy Reveals New Insights into the Species Validity of the Neocaridina davidi-N. denticulata-N. heteropoda Complex and Mitogenomic Phylogeny of Caridean Shrimps. Current Issues in Molecular Biology 46: 12279-12298.
3. Shih et al., 2024. Integrative Taxonomy Reveals Freshwater Shrimp Diversity from Kyushu and Southern Honshu of Japan, with a Discussion on Introduced Species. Zoological Studies 63: 18.
4. Zhou et al., 2021. Species diversity of freshwater shrimp in Henan Province, China, based on morphological characters and COI mitochondrial gene. Ecology and Evolution 11: 10502-10514.
5. Han et al., 2019. Geographical and temporal origins of Neocaridina species in Taiwan. BMC Genetics 20: 86.
6. Mitsugi and Suzuki, 2018. Life history of an invasive freshwater shrimp Neocaridina davidi in the Tomoe River, eastern Japan. Crustacean Research 47: 9-16.
7. Kusmintarsih et al., 2023. Barcoding of ornamental freshwater shrimp, Neocaridina denticulata, from the aquatic ornamental market in Purbalingga, Central Java, Indonesia. Biodiversitas 24(7): 3766-3773.
8. Bochini et al., 2024. Confirmed by integrative taxonomy first and unusual occurrence of the exotic shrimp Neocaridina davidi (Caridea: Atyidae) in Brazil. Boletim do Instituto de Pesca 50: e849.
9. Cai and Ng, 1999. A revision of the Caridina serrata species group, with descriptions of five new species. Journal of Natural History 33: 1603-1638.
10. Jablonska et al., 2018. First record and DNA barcodes of the aquarium shrimp, Neocaridina davidi, in Central Europe from thermally polluted River Oder canal, Poland. Knowledge and Management of Aquatic Ecosystems 419: 14.
11. Suen and Gillett-Kaufman, 2020, revised 2024. Cherry Shrimp Neocaridina davidi (Bouvier 1904). UF/IFAS Extension EENY-751.
12. Shih, Cai and Chiu, 2019. Neocaridina fonticulata, a new land-locked freshwater shrimp from Hengchun Peninsula, Taiwan. ZooKeys 817: 11-23.
13. Naruse, Shokita and Cai, 2006. Neocaridina iriomotensis, a new species of land-locked freshwater shrimp from Iriomote Island, southern Ryukyus, Japan. Proceedings of the Biological Society of Washington 119(1): 25-31.

Related

• Trade lines, colour and crossing records
• Sex and life-stage confidence
• Health observations without photo diagnosis
• The open appearance-grade standard