Blue Tiger Shrimp Care Guide - Aquarium Setup, Diet & Breeding

Blue Tiger Shrimp are small freshwater shrimp recognised for their blue, grey or smoky body colour and contrasting dark tiger-like bands. Their pattern can vary considerably, from subtle striping to bold, almost black markings, while the intensity of the blue depends on genetics, age, sex and surroundings.

Like other dwarf Caridina, they spend much of their time grazing across surfaces with their tiny pincers. They are peaceful, active invertebrates that become especially entertaining to watch in a group, picking through plants, wood and hardscape for microscopic food particles.

In nature, Caridina mariae inhabits clean, oxygen-rich freshwater streams and headwaters. These environments typically contain smooth stones, leaf litter, submerged branches and a steady supply of algae and biofilm.

Blue Tiger Shrimp are captive-bred ornamental shrimp rather than a naturally occurring blue population. Their striking appearance and manageable size have made them popular with aquarists who enjoy planted nano aquariums and carefully maintained shrimp colonies.

Blue Tiger Shrimp are a selectively developed colour variety of Caridina mariae, a freshwater shrimp native to Taiwan in East Asia. The wild species is associated with clear, cool streams and forested waterways.

A group of Blue Tiger Shrimp should have at least 20 litres of mature, stable water, with a practical footprint of about 30 × 20 cm or larger. Use a gentle filter with an intake guard or sponge pre-filter, and provide plenty of moss, fine-leaved plants, driftwood, rocks and other surfaces for grazing and shelter. A dark, inert shrimp substrate can help show off their colour, while stable, clean, well-oxygenated water is more important than elaborate decoration.

Females reach about 3 cm (1.2 inches), while males are usually smaller at around 2–2.5 cm (0.8–1 inch).

Blue Tiger Shrimp graze naturally on algae, biofilm, microorganisms and decomposing plant material. Supplement this with a quality shrimp food containing minerals and plant ingredients, along with occasional blanched spinach, courgette or other suitable vegetables. Small amounts of protein-rich food can be offered periodically, but uneaten food should be removed promptly to protect water quality.

Blue Tiger Shrimp are best kept with other peaceful dwarf shrimp, snails such as nerites and small peaceful invertebrate-friendly species. They can usually be housed with adult Amano Shrimp and compatible Caridina varieties, although mixing different Caridina lines may produce unpredictable offspring. Most fish, including small tetras, rasboras, livebearers and bettas, may eat shrimplets and can harass adults, so a dedicated shrimp aquarium is safest for colony growth.

Blue Tiger Shrimp breed readily in mature, stable freshwater aquariums when they are well fed and free from predators. Females carry roughly 20–30 eggs beneath the abdomen for around four weeks, gently fanning them until they hatch. The young emerge as fully formed miniature shrimp and should have access to biofilm, fine powdered foods and other suitably small foods. They do not require brackish water or a larval marine stage.

Females are generally larger and deeper-bodied than males, with a broader abdomen for carrying eggs. They may also show a more pronounced saddle or developing eggs, whereas males tend to be slimmer and more lightly built.