Blue Tiger Shrimp
Caridina mariae
A blue-bodied tiger shrimp with bold dark stripes, prized by collectors.
| Difficulty | Advanced |
| Min. Tank Size | 40 L |
| Temperature | 20.0–25.0 °C |
| pH Range | 6.0–7.0 |
| Max Size | 3.0 cm |
| Lifespan | 1-2 years |
| Diet | Omnivore |
| Temperament | Peaceful |
Overview
The Blue Tiger Shrimp (Caridina mariae) is a blue-bodied tiger shrimp with bold dark stripes, prized by collectors. It reaches about 3 cm and can live for roughly 1-2 years with good care.
This guide covers everything in plain language: tank size and setup, water parameters, the best foods (with recommended brands), which shrimp and tank mates it can safely live with, breeding, and the common problems to avoid. It is rated Advanced to keep.
Natural Habitat & Origin
Freshwater shrimp come from streams, pools and lakes across Asia. They are sensitive to copper, ammonia and sudden changes, so a mature, stable, planted tank is the secret to keeping and breeding them.
Tank Size & Setup
Provide at least 40 litres. Even small shrimp do best in a stable, well-established tank, as larger water volumes stay cleaner and swing less.
A mature, planted tank with moss, leaf litter and biofilm is ideal. Use a sponge filter (or a guard over the intake) so babies aren't sucked in, and never add anything containing copper, which is deadly to shrimp.
Always add invertebrates only to a fully cycled, mature tank - they are far more sensitive to ammonia and nitrite than most fish.
Water Parameters
Keep the Blue Tiger Shrimp at 20-25 °C with a pH of 6.0-7.0, in soft, acidic water (GH 4-6) - usually made with RO water and a bee-shrimp mineral such as Salty Shrimp GH+.
Stability is everything for invertebrates: test regularly, keep ammonia and nitrite at zero and nitrate low, drip-acclimate new arrivals slowly over an hour, and make only small, steady water changes. Remember that copper - found in some fish medicines and plant fertilisers - is lethal, so always check labels.
Diet & Feeding
The Blue Tiger Shrimp is a omnivore. In Australia, good options include Hikari Shrimp Cuisine, Dymax Shrimp Booster and blanched vegetables (zucchini, spinach), plus the natural biofilm and algae of a mature planted tank.
Feed lightly - invertebrates get much of their food from natural biofilm and algae, and overfeeding quickly fouls the water and triggers losses. A little, a few times a week, is plenty for most shrimp and snails.
Which Shrimp & Tank Mates Can Live Together?
Important: tiger shrimp are also Caridina and can interbreed with bee/crystal shrimp, so keep them apart if you want pure lines (the cross is the basis of 'tibee' and Taiwan Bee shrimp). They will not cross with Neocaridina cherries, so those two groups can be combined if the water suits both. Keep with snails and small peaceful fish; avoid anything that hunts shrimp.
Breeding
It breeds very easily in stable, copper-free water - berried females carry eggs under the tail for 3-4 weeks until tiny, fully-formed shrimp hatch. Soft, acidic water is essential for this line to breed well.
Common Problems & Care Tips
The biggest killers of shrimp are copper, ammonia spikes and sudden changes in water - go slowly and keep things stable. Watch moulting closely: shrimp shed their shell to grow, and a failed moult (often from a lack of minerals or a big water change) can be fatal, so keep GH steady.
Quarantine and acclimate all new livestock carefully, and watch daily for sluggishness, failure to eat or trouble moulting.
Is the Blue Tiger Shrimp Right for You?
The Blue Tiger Shrimp suits keepers with some experience and a stable, mature, well-planned tank, as long as you can provide 40+ litres, the right water, copper-free conditions and suitable tank mates.
Get the basics right and these fascinating invertebrates are some of the most rewarding animals in the hobby. Use our aquarium tools to plan your setup and browse our fish and plant guides for safe tank mates.