The Ninja Shrimp is a fascinating, completely peaceful dwarf shrimp named for its rapid, darting movements and unique ability to quickly change color (from black and brown to red, blue, or translucent) to camouflage with its surroundings. Unlike Neocaridina, their larvae require brackish water to survive, meaning they will not reproduce and overpopulate a freshwater aquarium.
Ninja Shrimp At a Glance
Ninja Shrimp Tank Requirements
Will Ninja Shrimp fit in your tank?
Care guides tell you what Ninja Shrimp needs, the next question is whether your tank can safely provide it. Test Ninja Shrimp against your tank size, maintenance needs, and the fish you already keep before you buy.
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Ninja Shrimp Water Parameters
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Ninja Shrimp Temperament & Compatibility
Ninja Shrimp Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard / Unsexed
The standard Ninja Shrimp. They thrive in mature, planted tanks where they will constantly graze on biofilm, soft algae, and decaying plant matter. Best kept in groups of 5 or more to ensure they feel secure enough to forage openly.
Differs in 1 trait from base species
Also known as: Wild Type
Ninja Shrimp Care Guide Summary
The Ninja Shrimp, scientifically known as Caridina serratirostris, belongs to the Invertebrates family group. Adults reach a maximum size of approximately 3 cm and have a fusiform body shape with a fast growth rate. Classified as peaceful, this species primarily occupies the bottom and mid-level zones of the aquarium and produces a low level of biological waste.
To thrive, the Ninja Shrimp requires a freshwater only aquarium with a minimum volume of 19 litres and a tank length of at least 30 cm. Water temperature should be maintained between 22°C and 28°C, with a pH range of 6.5–7.5 and a general hardness of 4–10 dGH. A moderate water flow is preferred.
Due to its specialist needs, the Ninja Shrimp is best suited for fishkeepers who can provide a carefully planned setup. The Ninja Shrimp is typically available in one standard form.
Ninja Shrimp Habitat Setup
When setting up an aquarium for the Ninja Shrimp, a moderate water flow best suits their natural preferences. Because this species occupies the bottom and mid-level zones, the aquarium layout should prioritise open swimming space in the centre of the tank for free movement and sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include driftwood, which can serve as both a hiding place and a dietary supplement, leaf litter or blackwater tannins to replicate their natural soft-water habitat, an established tank with natural algae growth, as they depend on it as a primary food source, and dense planting to provide cover, break sightlines, and reduce stress.
Ninja Shrimp Compatibility Notes
Classified as peaceful, the Ninja Shrimp is a social species that requires the company of its own kind to thrive. When choosing tankmates, their energetic swimming style may stress more sedentary or timid species. Selecting tankmates that favour different water layers from the bottom and mid-level zones can help reduce competition and territorial overlap.
Ninja Shrimp Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Ninja Shrimp.
5 Gallon
10 Gallon Standard
15 Gallon Standard
20 Gallon High
20 Gallon Long
29 Gallon Standard
Show 27 more tank sizes
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Frequently Asked Questions About Ninja Shrimp
How big does Ninja Shrimp get?
Ninja Shrimp (Caridina serratirostris) typically reaches a maximum adult size of approximately 3 cm. They have a fusiform body shape and a fast growth rate.
What tank size does Ninja Shrimp need?
A minimum aquarium volume of 19 litres and a tank length of at least 30 cm are recommended for Ninja Shrimp. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Ninja Shrimp need?
Ninja Shrimp thrives in freshwater only conditions with a temperature range of 22–28°C, a pH between 6.5 and 7.5, and a general hardness of 4–10 dGH. A moderate water flow is preferred.
Is Ninja Shrimp peaceful or aggressive?
Ninja Shrimp is classified as peaceful with an aggression score of 0 out of 10. They are generally well-suited to peaceful community tanks.
Can Ninja Shrimp live alone?
No, Ninja Shrimp should be kept in groups of at least 5 to reduce stress and encourage natural behaviour.
Does Ninja Shrimp have any special tank requirements?
Yes. Ninja Shrimp benefits from established algae (otocinclus), plants - densely covered, leaf litter/blackwater, and driftwood (digestion/hiding) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Top Tank Mates for Ninja Shrimp
These fish are strong compatibility matches for Ninja Shrimp based on water preferences, temperament, adult size, and tank behavior.
Japanese Ricefish (Medaka)
Oryzias latipes
Ideal Tank MatesParkinson's Rainbowfish
Melanotaenia parkinsoni
Ideal Tank MatesPacific Blue Eye
Pseudomugil signifer
Ideal Tank MatesOgilby's Rainbowfish
Melanotaenia ogilbyi
Ideal Tank MatesPearl Danio
Danio albolineatus
Ideal Tank MatesNew Guinea Rainbowfish
Melanotaenia affinis
Ideal Tank MatesPlants That Suit Ninja Shrimp
These plants pair well with Ninja Shrimp based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
Afzel's Anubias
Anubias afzelii
Amazon Sword
Echinodorus amazonicus
Anacharis
Egeria densa
Anubias Barteri
Anubias barteri
Baby Tears
Lindernia rotundifolia
Balansae
Cryptocoryne crispatula
Fish Similar to Ninja Shrimp
Brown Camo Shrimp
Caridina babaulti var. Brown
The Brown Camo Shrimp (Caridina babaulti) is a fascinating dwarf shrimp known for its ability to rapidly change color to match its surroundings, much like a chameleon. They are excellent scavengers and algae grazers. Unlike some highly sensitive Caridina species (like Crystal Reds), Babaulti are relatively hardy and can adapt to a wider range of water parameters, making them a great choice for planted nano tanks.
Bee Shrimp (Crystal Red / Black)
Caridina cantonensis
A sensitive, highly prized dwarf shrimp species known for its vivid red/white or black/white banding. Unlike the hardy Cherry Shrimp (Neocaridina), Bee Shrimp require cool, soft, acidic water and typically require active buffering soil to thrive. They are peaceful grazers perfect for specific biotope setups.
Purple Zebra Shrimp
Potamalpheops sp.
The Purple Zebra Shrimp is a fascinating, highly adaptable micro-shrimp. Although technically part of the Snapping/Pistol shrimp family (Alpheidae), they are incredibly tiny and entirely peaceful. Famous for their purple striping, they spend most of their time grazing on biofilm and hiding in crevices. While they thrive in freshwater or brackish setups (often kept with Opae Ula), their larvae require saltwater to develop, making captive breeding in freshwater impossible.
Bee Shrimp
Caridina logemanni
A highly prized dwarf freshwater shrimp known for its striking opaque color bands. Native to streams in Southern China, they require specific parameters to thrive: cool, highly oxygenated, acidic, and very soft water. This is usually achieved using RO (Reverse Osmosis) water remineralized with specific shrimp salts and active buffering soil. They are highly sensitive to nitrogen spikes and copper, and are extremely vulnerable to fish predation.
Orange Delight Shrimp
Caridina loehae
An advanced-level, delicate dwarf shrimp native to the ancient Malili lake system in Sulawesi, Indonesia. Scientifically described as Caridina loehae, they are characterized by their bright orange bodies and white dashes. They require highly stable, warm (26-29°C), and alkaline water mirroring their native ancient lakes. They are peaceful biofilm grazers that will not survive in standard freshwater conditions.
Malaya Shrimp
Caridina sp. "Malaya"
A unique and highly variable dwarf shrimp native to Southeast Asia. Unlike most dwarf shrimp, Malaya Shrimp are a low-order species, meaning their eggs hatch into tiny larvae rather than fully-formed shrimplets. However, unlike Amano Shrimp, these larvae do not require saltwater or brackish conditions; they metamorphose completely in freshwater. They are peaceful, active scavengers and excellent algae eaters that come in a wide array of colors including red, blue, green, brown, and clear.