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Hinomaru Shrimp
Caridina logemanni
Animalia›Arthropoda›Malacostraca›Decapoda›Atyidae
The Hinomaru Shrimp is a striking freshwater shrimp variety featuring a predominantly red body with a distinctive white or cream-colored circular marking on the dorsal surface, resembling the Japanese flag (hinomaru). This selectively bred Caridina variant is prized for its bold coloration contrast and compact size, making it an attractive addition to planted aquariums.
Where it's from
Recorded as introduced in Norway
At a glance
- Size
- 1.25 in
- 3 cm
- Min tank
- 5 gal
- 19 L
- Group
- 10+
- Temp
- 72–79°F
- 22–26°C
- pH
- 5.5-6.5
- GH
- 71–107 ppm
- 4–6 dGH
- Temperament
- Peaceful
- Swims
- Bottom
- Lifespan
- 1-2 yrs
Ammonia 0 ppm and nitrate under 20 ppm.
Care
Diet
Hinomaru Shrimp are detritivores that graze on biofilm and algae throughout the day. Supplement with high-quality shrimp-specific foods such as Shirakura or Mosura pellets 2-3 times weekly. Occasional blanched vegetables like spinach or zucchini provide variety and essential nutrients.
Behavior
These shrimp are active grazers, constantly foraging along substrate and plant surfaces for food particles and biofilm. They exhibit typical Caridina molting behavior, becoming vulnerable during shell hardening; provide plenty of hiding spots with plants and wood. Colony dynamics remain peaceful with minimal aggression between individuals.
Breeding
Hinomaru Shrimp require soft, acidic water (pH 5.5-6.5, GH 4-6) to successfully breed and produce viable offspring. Females carry berries (eggs) for 3-4 weeks before releasing fully-formed miniature shrimp. Provide dense plant cover and stable water parameters to encourage breeding success; fry are independent and require no special care beyond the colony's standard feeding.
Tank mates
See all 6Small, peaceful algae eater that shares bottom zone without competing or predating shrimp
Tiny, non-aggressive fish that occupy mid-water column and ignore shrimp
Nano fish with peaceful temperament; minimal interaction with shrimp colony
Larger shrimp species that coexist peacefully; may compete for food but no predation
Dense plant cover provides shelter, biofilm growth, and breeding habitat for shrimp
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Common diseases 4Molting Failure / Incomplete Molting, Muscular Necrosis (MDC - Midgut Diverticula Collapse), Vorticella / Epistylis Infection, Copper Toxicity
Molting Failure / Incomplete Molting
Shrimp unable to shed exoskeleton completely; pieces of old shell remain attached; lethargy and reduced feeding
Ensure adequate mineral content through GH supplementation (calcium, magnesium); maintain stable pH and temperature; provide soft plant matter for grip during molting; increase water change frequency to reduce bioload
Muscular Necrosis (MDC - Midgut Diverticula Collapse)
White discoloration in muscle tissue, particularly in the abdomen; loss of color intensity; reduced mobility and feeding
Improve water quality with frequent partial water changes; ensure diet includes varied foods with adequate nutrients; use mineral-rich supplements like Shirakura or Mosura; maintain optimal pH and GH parameters
Vorticella / Epistylis Infection
White fuzzy coating on body and appendages; lethargy; difficulty molting; shrimp appear 'dusty'
Perform large water changes (50%) to reduce parasite load; add Indian almond leaves or alder cones to lower pH and increase tannins; improve water quality and reduce organic waste; quarantine severely affected individuals if possible
Copper Toxicity
Sudden death or lethargy; loss of color; tremors; gasping behavior
Avoid all copper-based medications and fertilizers; use copper-free plant fertilizers only; perform immediate large water change (50%+); use activated carbon in filter if copper contamination is suspected; source water from copper-free supply
Legality
No state or federal restrictions on record.
Not legal advice, and possibly incomplete or out of date. Rules vary by state and change over time; check with your state wildlife or agriculture agency before buying, keeping or shipping it.
The care information here is written with AI help, so it can contain mistakes. Spot one? Tell us and we'll fix it. Native range: Global Register of Invasive and Introduced Species (CC BY 4.0).
At a glance
- Size
- 1.25 in3 cm
- Min tank
- 5 gal19 L
- Group
- 10+
- Temp
- 72–79°F22–26°C
- pH
- 5.5-6.5
- GH
- 71–107 ppm4–6 dGH
- Temperament
- Peaceful
- Swims
- Bottom
- Lifespan
- 1-2 yrs
Ammonia 0 ppm and nitrate under 20 ppm.
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