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Invertebrate Freshwater Care: medium Peaceful

Tiger Shrimp

Caridina mariae
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Other names: Caridina cf. cantonensis 'Tiger', OEBT, Orange eye blue tiger, Black tiger shrimp
Group: Shrimp, crayfish and crabs · Family: Atyidae · Origin: East Asia — southern China (wild form); color forms originate from captive breeding

A small shrimp, a close relative of the bee shrimp, recognized by the thin black lines cutting across its body. More forgiving than the crystal shrimp; the blue-bodied, orange-eyed form (OEBT) is the best known.

Will it suit my tank?

Last updated October 16, 2026

Temperature
20–25°C
pH
6.5–7.5
Hardness
4–10 dGH
Adult size
3 cm
Minimum tank size
20 liters
Lifespan
1–2 years
Social structure
Colony
Group
at least 10, ideally 20+
Male–female ratio
Karışık; dişi ağırlıklı başlangıç
Swimming zone
All levels
Diet
Omnivore
Breeding
Other

Water parameters

Temperature20–25°C
pH6.5–7.5
General hardness (GH)4–10 dGH
Recommended range
Considered shrimp safe Suitable for planted tanks

Overview

October 16, 2026 · Suggest an edit

The tiger shrimp is recognized by the thin black stripes on each segment of its transparent or amber-toned body. It belongs to the same close-knit group of relatives as the bee shrimp and the crystal shrimp developed from it. Its care is similar to theirs, but it is more tolerant of water parameters; for this reason it is seen as an intermediate step between the red cherry and the crystal shrimp.

Breeders have developed many color forms from the wild pattern. All of them have the same care requirements; the difference is only in appearance.

Color and Fin Varieties

October 16, 2026 · Suggest an edit
  • Orange eye blue tiger (OEBT): Dark blue body, thin black stripes and orange eyes. The most sought-after form.
  • Black tiger: The body is almost entirely dark; the stripes are hard to make out.
  • Red tiger: Black stripes on a reddish base.

Natural Habitat

October 16, 2026 · Suggest an edit

Wild individuals live in the cool, clear, oxygen-rich streams of southern China. They graze on biofilm under rocks and among accumulations of roots and leaves.

Tank Setup

October 16, 2026 · Suggest an edit
  • Volume: 20 liters or more; as the colony grows, 40–60 liters keeps parameters more stable.
  • Water: GH 4–8, KH 1–4, pH 6.5–7.2 is the most comfortable range. In areas with soft tap water, aged tap water may be enough; in hard-water areas, RO water and shrimp minerals are needed.
  • Temperature: 20–24°C is ideal; losses increase if it stays above 26°C for long.
  • Substrate: An active substrate is not essential but helps keep pH stable.
  • Filter: A sponge filter or a powered filter with a sponge-protected intake.
  • Maturity: An aquarium at least 4–6 weeks old with established biofilm.

Diet

October 16, 2026 · Suggest an edit

Omnivorous. Its main food is biofilm and fine algae. It is supplemented with shrimp food, spirulina tablets, dried almond or oak leaves and blanched spinach. Feed sparingly; remove food not eaten within 2–3 hours.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

Completely peaceful. In a larger group it becomes bolder and is seen more during the day.

Good companions: Nerite and horned snails, otocinclus, very small, peaceful fish (accepting some loss of young), Neocaridina shrimp (being a different genus, they do not interbreed).

Avoid: Bee and crystal shrimp (they hybridize and the patterns are spoiled), bettas, cichlids, any fish whose mouth can fit a shrimp, medications and fertilizers containing copper.

Group and Colony Structure

October 16, 2026 · Suggest an edit

The tiger shrimp is set up as a colony. Start with at least 10, preferably 20 individuals; a female-heavy start helps the colony grow faster. To preserve the color line, only individuals with the desired pattern are used for breeding, and those that turn out pale or a different color are moved to a separate aquarium. Keeping a single color form per aquarium is the cleanest approach.

Breeding

October 16, 2026 · Suggest an edit

There is no larval stage. The female carries 20–30 eggs under her abdomen for about 3–4 weeks, and tiny but fully formed shrimp hatch from them. In the color forms, some of the young may come out paler than their parents or closer to the wild color; that is why regular selection is needed. If kept in the same aquarium as bee shrimp, hybrids will form.

Health and Common Problems

October 16, 2026 · Suggest an edit
  • Failed molts: Sudden water changes or unsuitable GH. Do small, regular water changes.
  • Sudden mass deaths: Usually temperature or pH swings, ammonia or copper.
  • Planaria and hydra: They multiply with overfeeding; reduce feeding and treat with shrimp-safe products.

Sexing

October 16, 2026 · Suggest an edit

Females are larger, with a wider and deeper abdomen; when mature, a saddle of developing eggs may be visible on the back. Males are smaller and slimmer.

Tank mates

This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.

Usually compatible

Should not be kept together

Hobbyist notes

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Change history and contributors
  1. Page created · October 16, 2026