Photo: No machine-readable author provided. Mirrakor assumed (based on copyright claims). (CC BY-SA 3.0) — via Wikimedia Commons
Tiger Shrimp (Caridina mariae)
A striking striped dwarf shrimp with bold tiger-pattern colouration — the Caridina counterpart to the Crystal Red, and a rewarding challenge for experienced shrimp keepers.
Will it live with a Tiger Shrimp?
We compare each fish against your tiger shrimp on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.
- Blackwing Hatchetfish✅ CompatiblePeaceful · 3.5 cm · Medium care · 23–28 °C (73–82 °F)
- Compatible on the things that matter: shared water near 23–25 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Blackwing Hatchetfish in a shoal of 6+ or it gets stressed and nippy.
- Cherry Shrimp✅ CompatiblePeaceful · 3 cm · Easy care · 18–28 °C (64–82 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Cherry Shrimp in a shoal of 10+ or it gets stressed and nippy.
- Clown Killifish✅ CompatiblePeaceful · 3.5 cm · Medium care · 22–26 °C (72–79 °F)
- Both are peaceful, and their water overlaps around 22–25 °C — no size, zone or temperament conflicts.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Clown Killifish in a shoal of 6+ or it gets stressed and nippy.
- Crimson Red Betta✅ CompatiblePeaceful · 3.5 cm · Hard care · 24–29 °C (75–84 °F)
- Compatible on the things that matter: shared water near 24–25 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Crystal Red Shrimp✅ CompatiblePeaceful · 2.5 cm · Hard care · 20–24 °C (68–75 °F)
- Both are peaceful, and their water overlaps around 20–24 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Crystal Red Shrimp in a shoal of 10+ or it gets stressed and nippy.
- Dawn Tetra✅ CompatiblePeaceful · 2.5 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 22–25 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Dawn Tetra in a shoal of 8+ or it gets stressed and nippy.
- Dwarf Spotted Rasbora✅ CompatiblePeaceful · 2.5 cm · Medium care · 23–28 °C (73–82 °F)
- Both are peaceful, and their water overlaps around 23–25 °C — no size, zone or temperament conflicts.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Dwarf Spotted Rasbora in a shoal of 8+ or it gets stressed and nippy.
- Eyespot Rasbora✅ CompatiblePeaceful · 3.5 cm · Medium care · 20–25 °C (68–77 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Eyespot Rasbora in a shoal of 8+ or it gets stressed and nippy.
- Fire Red Licorice Gourami✅ CompatiblePeaceful · 3.5 cm · Hard care · 23–28 °C (73–82 °F)
- Both are peaceful, and their water overlaps around 23–25 °C — no size, zone or temperament conflicts.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Glowlight Danio✅ CompatiblePeaceful · 3 cm · Easy care · 22–26 °C (72–79 °F)
- Compatible on the things that matter: shared water near 22–25 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Glowlight Danio in a shoal of 8+ or it gets stressed and nippy.
- Glowlight Rasbora✅ CompatiblePeaceful · 3.5 cm · Easy care · 23–28 °C (73–82 °F)
- Compatible on the things that matter: shared water near 23–25 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Glowlight Rasbora in a shoal of 8+ or it gets stressed and nippy.
- Gold Ring Danio✅ CompatiblePeaceful · 3 cm · Easy care · 18–26 °C (64–79 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Gold Ring Danio in a shoal of 8+ or it gets stressed and nippy.
- Green Neon Tetra✅ CompatiblePeaceful · 2.5 cm · Hard care · 24–28 °C (75–82 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Green Neon Tetra in a shoal of 8+ or it gets stressed and nippy.
- Lambchop Rasbora✅ CompatiblePeaceful · 3 cm · Medium care · 23–28 °C (73–82 °F)
- Compatible on the things that matter: shared water near 23–25 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Lambchop Rasbora in a shoal of 6+ or it gets stressed and nippy.
- Neon Blue Rasbora✅ CompatiblePeaceful · 2.5 cm · Medium care · 23–26 °C (73–79 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
- Neon Tetra✅ CompatiblePeaceful · 3 cm · Easy care · 20–26 °C (68–79 °F)
- Compatible on the things that matter: shared water near 20–25 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Neon Tetra in a shoal of 6+ or it gets stressed and nippy.
- Northern Glowlight Danio✅ CompatiblePeaceful · 3.5 cm · Medium care · 18–24 °C (64–75 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Northern Glowlight Danio in a shoal of 8+ or it gets stressed and nippy.
- Otocinclus✅ CompatiblePeaceful · 4 cm · Medium care · 21–26 °C (70–79 °F)
- Both are peaceful, and their water overlaps around 21–25 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Otocinclus in a shoal of 6+ or it gets stressed and nippy.
- Pea Puffer✅ CompatibleSemi-aggressive · 2.5 cm · Medium care · 24–28 °C (75–82 °F)
- Peaceful + Semi-aggressive, but with no direct clash here, and their water overlaps around 24–25 °C — no size, zone or temperament conflicts.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Pygmy Corydoras✅ CompatiblePeaceful · 3.2 cm · Easy care · 22–26 °C (72–79 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Pygmy Corydoras in a shoal of 8+ or it gets stressed and nippy.
- Rainbow Emperor Tetra✅ CompatibleSemi-aggressive · 3.6 cm · Medium care · 22–28 °C (72–82 °F)
- Peaceful + Semi-aggressive, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Rainbow Emperor Tetra in a shoal of 8+ or it gets stressed and nippy.
- Tail-spot Corydoras✅ CompatiblePeaceful · 3 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 22–25 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Tail-spot Corydoras in a shoal of 8+ or it gets stressed and nippy.
- Tailspotted Oto✅ CompatiblePeaceful · 3.5 cm · Medium care · 22–27 °C (72–81 °F)
- Both are peaceful, and their water overlaps around 22–25 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Tailspotted Oto in a shoal of 6+ or it gets stressed and nippy.
- Trinidad Guppy✅ CompatiblePeaceful · 3 cm · Easy care · 19–24 °C (66–75 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- African Dwarf Frog⚠️ With cautionPeaceful · 4 cm · Medium care · 22–26 °C (72–79 °F)
- African Dwarf Frog may eat Tiger Shrimp or pick off its shrimplets — a densely planted tank with moss gives them a fighting chance.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Amapá Tetra⚠️ With cautionPeaceful · 4 cm · Medium care · 24–27 °C (75–81 °F)
- Adult Tiger Shrimp might survive with Amapá Tetra, but expect the young to be eaten — plant heavily.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Amapá Tetra in a shoal of 6+ or it gets stressed and nippy.
- Assassin Snail⚠️ With cautionPeaceful · 3 cm · Easy care · 22–26 °C (72–79 °F)
- Water hardness preferences differ (Tiger Shrimp 0–6 vs Assassin Snail 8–20 dGH).
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Black Darter Tetra⚠️ With cautionSemi-aggressive · 4 cm · Hard care · 21–28 °C (70–82 °F)
- Adult Tiger Shrimp might survive with Black Darter Tetra, but expect the young to be eaten — plant heavily.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Blue Danio⚠️ With cautionPeaceful · 4 cm · Easy care · 21–26 °C (70–79 °F)
- Blue Danio may eat Tiger Shrimp or pick off its shrimplets — a densely planted tank with moss gives them a fighting chance.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Blue Danio in a shoal of 6+ or it gets stressed and nippy.
- Blue Emperor Tetra⚠️ With cautionPeaceful · 4 cm · Medium care · 23–27 °C (73–81 °F)
- Blue Emperor Tetra may eat Tiger Shrimp or pick off its shrimplets — a densely planted tank with moss gives them a fighting chance.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Blue Emperor Tetra in a shoal of 6+ or it gets stressed and nippy.
- Cardinal Tetra⚠️ With cautionPeaceful · 4 cm · Medium care · 23–27 °C (73–81 °F)
- Adult Tiger Shrimp might survive with Cardinal Tetra, but expect the young to be eaten — plant heavily.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Cardinal Tetra in a shoal of 6+ or it gets stressed and nippy.
- Emperor Tetra⚠️ With cautionPeaceful · 4 cm · Easy care · 23–27 °C (73–81 °F)
- Adult Tiger Shrimp might survive with Emperor Tetra, but expect the young to be eaten — plant heavily.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Emperor Tetra in a shoal of 6+ or it gets stressed and nippy.
- Endler's Livebearer⚠️ With cautionPeaceful · 3 cm · Easy care · 22–28 °C (72–82 °F)
- Water hardness preferences differ (Tiger Shrimp 0–6 vs Endler's Livebearer 10–25 dGH).
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Endler's Livebearer in a shoal of 6+ or it gets stressed and nippy.
- Flame Tetra⚠️ With cautionPeaceful · 4 cm · Easy care · 22–28 °C (72–82 °F)
- Flame Tetra may eat Tiger Shrimp or pick off its shrimplets — a densely planted tank with moss gives them a fighting chance.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Flame Tetra in a shoal of 6+ or it gets stressed and nippy.
- Ghost Shrimp⚠️ With cautionPeaceful · 4 cm · Easy care · 18–28 °C (64–82 °F)
- Adult Tiger Shrimp might survive with Ghost Shrimp, but expect the young to be eaten — plant heavily.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Ghost Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Glowlight Tetra⚠️ With cautionPeaceful · 4 cm · Easy care · 22–28 °C (72–82 °F)
- Glowlight Tetra may eat Tiger Shrimp or pick off its shrimplets — a densely planted tank with moss gives them a fighting chance.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Glowlight Tetra in a shoal of 6+ or it gets stressed and nippy.
- Golden Dwarf Barb⚠️ With cautionPeaceful · 4 cm · Easy care · 18–24 °C (64–75 °F)
- Golden Dwarf Barb may eat Tiger Shrimp or pick off its shrimplets — a densely planted tank with moss gives them a fighting chance.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Golden Dwarf Barb in a shoal of 6+ or it gets stressed and nippy.
- Jelly Bean Tetra⚠️ With cautionPeaceful · 4 cm · Medium care · 20–26 °C (68–79 °F)
- Jelly Bean Tetra may eat Tiger Shrimp or pick off its shrimplets — a densely planted tank with moss gives them a fighting chance.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Keep Jelly Bean Tetra in a shoal of 10+ or it gets stressed and nippy.
- Malaysian Trumpet Snail⚠️ With cautionPeaceful · 3 cm · Easy care · 21–27 °C (70–81 °F)
- Water hardness preferences differ (Tiger Shrimp 0–6 vs Malaysian Trumpet Snail 8–18 dGH).
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Nerite Snail⚠️ With cautionPeaceful · 2.5 cm · Easy care · 22–28 °C (72–82 °F)
- Water hardness preferences differ (Tiger Shrimp 0–6 vs Nerite Snail 8–18 dGH).
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Alligator Gar⛔ Not recommendedAggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
- Alligator Gar will hunt and eat Tiger Shrimp — keep shrimp only with small, peaceful, non-predatory fish.
- Your 75 L tank is below the ~3785 L this pairing really wants — crowding raises aggression.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Clown Knifefish⛔ Not recommendedAggressive · 90 cm · Hard care · 24–28 °C (75–82 °F)
- Clown Knifefish will hunt and eat Tiger Shrimp — keep shrimp only with small, peaceful, non-predatory fish.
- Your 75 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Fire Eel⛔ Not recommendedSemi-aggressive · 100 cm · Medium care · 24–28 °C (75–82 °F)
- Fire Eel will hunt and eat Tiger Shrimp — keep shrimp only with small, peaceful, non-predatory fish.
- Your 75 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Nile Bichir⛔ Not recommendedSemi-aggressive · 70 cm · Medium care · 25–28 °C (77–82 °F)
- Nile Bichir will hunt and eat Tiger Shrimp — keep shrimp only with small, peaceful, non-predatory fish.
- Your 75 L tank is below the ~450 L this pairing really wants — crowding raises aggression.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Redtail Catfish⛔ Not recommendedAggressive · 120 cm · Hard care · 24–27 °C (75–81 °F)
- Redtail Catfish will hunt and eat Tiger Shrimp — keep shrimp only with small, peaceful, non-predatory fish.
- Your 75 L tank is below the ~5700 L this pairing really wants — crowding raises aggression.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Spotted Gar⛔ Not recommendedAggressive · 90 cm · Hard care · 18–26 °C (64–79 °F)
- Spotted Gar will hunt and eat Tiger Shrimp — keep shrimp only with small, peaceful, non-predatory fish.
- Your 75 L tank is below the ~600 L this pairing really wants — crowding raises aggression.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Wels Catfish⛔ Not recommendedAggressive · 300 cm · Hard care · 15–25 °C (59–77 °F)
- Wels Catfish will hunt and eat Tiger Shrimp — keep shrimp only with small, peaceful, non-predatory fish.
- Your 75 L tank is below the ~20000 L this pairing really wants — crowding raises aggression.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Wolf Cichlid⛔ Not recommendedAggressive · 72 cm · Hard care · 24–30 °C (75–86 °F)
- Wolf Cichlid will hunt and eat Tiger Shrimp — keep shrimp only with small, peaceful, non-predatory fish.
- Water hardness preferences differ (Tiger Shrimp 0–6 vs Wolf Cichlid 8–20 dGH).
- Your 75 L tank is below the ~760 L this pairing really wants — crowding raises aggression.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
Compatibility is computed from each species' care data — a strong starting point, not a guarantee. Individual temperament varies, so always introduce new fish slowly and watch them.
Tiger Shrimp care specs
- Care level
- Hard
- Breeding
- Medium
- Max size
- 3 cm (1.2 in)
- Min tank size
- 30 L (7.9 gal)
- Temperature
- 20–25 °C (68–77 °F)
- pH
- 6–7
- Hardness
- 0–6 dGH
- Lifespan
- 1–2 years
- Diet
- Omnivore
- Swim level
- Bottom
- Group size
- 6+ (shoaling)
- Family
- Atyidae
- Origin
- Southeast Asia — streams and rivers of southern China, Taiwan and surrounding region
What is a Tiger Shrimp?
The Tiger Shrimp (Caridina mariae) is a freshwater dwarf shrimp native to the cool, soft-water streams of southern China, Taiwan and surrounding parts of Southeast Asia. What sets it apart in the hobby is its bold, horizontal striping across a translucent body — the tiger pattern that gives the species its name. Selective breeding has produced several recognised colour morphs traded under their own common names: the Black Tiger (dark chocolate stripes on pale body), the vivid Tangerine Tiger (orange body, dark bands), the Red Tiger, and the Blue Tiger. The OE (Overall Effect) Tiger results from crossing Caridina mariae with Crystal Red or Crystal Black Shrimp and carries patterns from both parents.
Adults grow to around 3 cm (just over 1 in), with females running slightly larger than males. They are bottom-dwellers that spend virtually all their waking hours grazing biofilm, algae, and decomposing plant matter from substrate, hardscape and plant surfaces. Entirely peaceful and harmless to anything they cannot fit in a fan-shaped feeding appendage, Tiger Shrimp are nonetheless a committed advanced-keeper species. Their demands on water chemistry are precise, and the consequences of drifting outside the target range are swift. Kept well, they breed readily and build a colony that is visually arresting from every angle of the tank.
Where do Tiger Shrimp come from?
Wild Caridina mariae inhabit the cool, shaded streams and river tributaries of southern China and Taiwan, where seasonal rainfall, dense riparian canopy and granite substrates produce water that is soft, low in minerals and gently acidic. Temperatures in these habitats often sit in the low-to-mid 20s Celsius and can dip further during winter months — meaningfully cooler than the tropical set-points used for most community fish.
This origin is the single most important fact to internalise before buying Tiger Shrimp. The cool, mineral-poor, acidic chemistry of their native streams must be replicated in the tank. There is no shortcut via conditioned tap water in most regions; reverse osmosis water remineralised to the correct target TDS is the standard approach among serious keepers.
What size tank do Tiger Shrimp need and how should it be set up?
The practical minimum is 30 litres (about 8 gallons), but a 40–60 L (10–16 gal) tank is considerably more stable and forgiving. Larger water volume buffers against the sudden parameter swings — a pH spike, a temperature overshoot — that can crash a shrimp colony overnight.
Substrate is critical: use an active buffering soil (ADA Amazonia, Fluval Stratum, UNS Controsoil or equivalents) that anchors pH in the 6.0–7.0 range and releases beneficial tannins. Standard inert gravel will not do the job. Active substrates exhaust their buffering capacity over 12–18 months, at which point a re-substrate or gradual transition is needed.
Filtration should be a sponge filter or a canister with a fine pre-filter sponge on the inlet. Tiger Shrimp are tiny and shrimplets are tinier — powerhead-style intakes will kill them. Sponge filters also cultivate the biofilm that shrimp graze constantly.
Plants and hardscape serve two purposes: they help stabilise water chemistry and they provide grazing surface. Java moss, Christmas moss, bucephalandra and anubias give shrimplets hiding cover and a continuous food surface. Cholla wood and Indian almond leaves contribute tannins that keep pH low and provide natural anti-bacterial properties.
Avoid copper in any form: copper-based fertilisers, algaecides or pipe-sealant residue will kill shrimp quickly at concentrations harmless to fish.
What water parameters do Tiger Shrimp need?
- Temperature: 20–25 °C (68–77 °F). Staying at the cooler end of this range extends lifespan and reduces bacterial load.
- pH: 6.0–7.0. Below 6.0 risks failed molts; above 7.0 stresses Caridina physiology.
- Hardness: 0–6 dGH. This means genuinely soft water — RO or very low-mineral source water only.
- TDS: Most keepers target 100–150 ppm when using Caridina-specific remineraliser.
Stability is more important than hitting exact target numbers on any single reading. Test weekly, especially when the buffering substrate is new or nearing the end of its life. Do not use whole-house water softeners as a substitute for RO — they replace calcium and magnesium with sodium, which is harmful at elevated concentrations.
What do Tiger Shrimp eat?
Tiger Shrimp are omnivores, but in practice the bulk of their nutrition comes from biofilm, microalgae and decomposing plant material that accumulates naturally on every hard surface in a mature tank. They are scavengers and grazers, not active hunters.
Supplement the biofilm with purpose-made shrimp foods: powdered biofilm and bacterial supplements (Bacter AE is widely used), sinking wafers based on algae or spirulina, and small portions of blanched vegetables such as spinach, zucchini or cucumber. Offer food every one to two days; remove uneaten portions within 24 hours to protect water quality. Overfeeding is the most common beginner mistake — a small colony in a mature, well-planted tank needs far less supplemental feeding than keepers expect. Avoid any food or fertiliser containing copper.
How do Tiger Shrimp behave and what are compatible tank mates?
Tiger Shrimp are entirely peaceful. They pose no threat to other animals and are, conversely, extremely vulnerable to predation. Their small adult size (3 cm / 1.2 in), slow movement and tendency to forage openly in mid-tank make them easy targets for almost any fish.
The safest and most productive setup is a species-only shrimp tank or a tank shared only with other dwarf shrimp that have compatible water requirements. Snails — nerites, ramshorns, bladder snails — make trouble-free tank mates and help clean up leftover food without threatening shrimp.
If mixing with fish is a priority, the field narrows sharply: only the smallest nano fish (chili rasboras, exclamation point rasboras, pygmy corydoras Corydoras pygmaeus or C. hastatus) stand any real chance of not consuming shrimplets. Even then, colony growth will be suppressed and casualties should be expected. Dense moss and leaf litter give shrimplets some cover, but cannot eliminate the risk.
For a full breakdown of safe and unsafe pairings, see Tiger Shrimp tank mates.
How do you tell male from female Tiger Shrimp — and what about molting?
Females grow visibly larger and develop a fuller, rounder abdomen. The most reliable indicator is the saddle — a green or yellow patch visible behind the head through the transparent body wall, which is a cluster of unfertilised eggs waiting to be moved to the underside of the tail after mating. Gravid females carrying eggs under the tail (said to be “berried”) are unmistakeable; the eggs are fanned continuously to keep them oxygenated.
Males are smaller, slimmer and do not develop a saddle. In a healthy group of six or more, the sex ratio is usually visible once individuals mature.
Molting is the other key physiological event to understand. Shrimp shed their exoskeleton as they grow, and a failed molt — where the shrimp cannot fully escape the old shell — is a leading cause of death. Causes include incorrect water parameters (especially wrong mineral balance), sudden changes, and lack of dietary minerals. Leave old molt shells in the tank for 24–48 hours; the shrimp will consume them to recoup calcium.
How do Tiger Shrimp breed?
Breeding Caridina mariae is rated medium difficulty — not because the behaviour is complex, but because it requires stable, correct water conditions sustained over weeks. When parameters are dialled in, breeding happens without any special intervention.
A gravid female (saddle visible) releases pheromones after molting that trigger intense searching behaviour in males. Mating is brief; the female then carries 20–30 fertilised eggs tucked beneath her tail for roughly three to four weeks, fanning them constantly. The eggs hatch as fully formed miniature shrimp — there is no larval stage. Shrimplets are 1–2 mm at birth and immediately begin grazing biofilm.
Colony growth is slow relative to Neocaridina shrimp. Maintain water quality, ensure biofilm availability and avoid predators, and a small starter group of six will build into a colony over several months. Consistent temperature at the lower end of the range (around 20–22 °C) slows metabolism but tends to produce healthier, longer-lived individuals.
What diseases affect Tiger Shrimp?
Tiger Shrimp are susceptible to several conditions, most of which are preventable through water quality and quarantine discipline.
Bacterial infections (presenting as lethargy, cloudy body or pink/orange discolouration) are almost always triggered by water that is too warm, too high in nitrates, or unstable. Vorticella and ellobiopsidae (a green fungal growth on the body) are parasitic infections occasionally introduced on new shrimp or plants. Muscular necrosis — a whitening of the muscle tissue, often starting at the tail — is associated with stress, elevated temperature and viral infection and has no reliable cure. Scutariella japonica, a small worm that attaches to the rostrum, is a manageable parasite addressed by salt dips (research carefully before attempting any dip treatment on Caridina).
Prevention centres on three practices: quarantine all new shrimp for two to four weeks before introducing to the main colony; never add fish-tank water when acclimating new shrimp; and keep nitrates below 10–15 ppm through regular water changes and a lightly stocked tank.
Health note: medication dosing and precise treatment protocols are beyond the scope of a care profile. Many medications safe for fish — including copper-based treatments and most salt-based protocols — are highly toxic to shrimp at standard doses. Always confirm shrimp-safety of any product before use, and consult a specialist shrimp forum or aquatic veterinarian for diagnosis guidance.
How long do Tiger Shrimp live?
Tiger Shrimp have a relatively short natural lifespan of 1–2 years. This is typical for small Caridina species and is a factor of body size rather than fragility. Individuals kept at the cooler end of the temperature range (20–22 °C) tend to reach closer to the upper bound; warmer water accelerates metabolism and shortens the window. Because colony health depends on a continuous cycle of new generations, the focus in a Tiger Shrimp setup is less on maximising individual lifespan and more on creating conditions that sustain reliable breeding — which, in a stable tank with good water chemistry, takes care of itself.
Frequently asked questions
What is the difference between Tiger Shrimp and Crystal Red Shrimp?
Both are Caridina species that need soft, acidic water, but they are different species. Tiger Shrimp (Caridina mariae) display horizontal tiger stripes, while Crystal Red Shrimp (Caridina cantonensis) show the classic red-and-white banded pattern. The two can be cross-bred to produce OE (Overall Effect) tigers, which are popular in the advanced hobby.
Can I keep Tiger Shrimp with fish?
It is strongly recommended to keep Tiger Shrimp in a species-only or shrimp-only tank. Even small, peaceful fish such as ember tetras will eat shrimplets. If you must mix them, choose only the smallest nano fish (chili rasboras, pygmy corydoras) and provide dense moss cover — but expect shrimplet survival to be low.
What you need to keep a tiger shrimp
The baseline is a heated, filtered 30 L+ tank: a reliable heater to hold 20–25 °C (68–77 °F), a gentle filter that won't batter a tiger shrimp in the current, and a tight-fitting lid. Cycle the tank fully before adding any fish.
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