Blue Tiger Shrimp Breeding Guide
How to breed the Blue Tiger morph of Caridina cantonensis: soft acidic low-TDS water, sexing berried females, and raising fully formed shrimplets without a larval stage.
Overview
The Blue Tiger is a selectively bred steel-blue tiger-patterned form of Caridina cantonensis, a dwarf shrimp whose wild ancestors come from streams of southern China, Hong Kong and Taiwan. Like all Caridina cantonensis morphs, it is a direct developer: eggs hatch into miniature copies of the adult, so no separate larval or brackish phase is involved.
Because the line has been bred for colour, it is more sensitive to water values than hardier shrimp and is generally rated an intermediate breeding project.
Sexing
Mature females are larger than males and have a deeper, more curved abdomen that forms a pouch for carrying eggs. According to Wikipedia, females release pheromones when ready to mate, prompting males to swim actively in search of them.
Conditioning
Keep a stable, fully cycled tank with soft, slightly acidic water close to the pH of the shrimp's native streams. Caridina cantonensis lines do best with soft water and cooler-than-tropical temperatures; The Shrimp Farm recommends roughly 18-24 °C (65-75 °F) for bee-line Caridina.
- Use an active, pH-buffering substrate to hold water below 7.0
- Feed a varied diet of biofilm, algae and prepared shrimp foods once daily
- Maintain low organic load with gentle filtration and regular partial water changes
Breeding Setup
A mature single-species tank is the most reliable setup. The Shrimp Farm notes Caridina bee-line shrimp prefer GH around 4-6, KH 0-2 and a pH below 7.0; the Blue Tiger tolerates the looser end of the tiger range. RO water remineralised to a low TDS is commonly used to keep these values steady.
Spawning & Berried Females
After mating the female carries the fertilised eggs beneath her abdomen, fanning them with her pleopods to keep water circulating. Wikipedia reports that at about 22 °C eggs hatch in roughly 28 days; The Shrimp Farm gives a comparable figure of around 30 days for bee-line Caridina.
Shrimplet/Larval Care
Eggs hatch directly into tiny, fully formed shrimplets that are immediately independent and only a couple of millimetres long. They graze on biofilm and fine detritus in a mature tank; no special larval feeding or salinity change is required.
Common Challenges
Sudden swings in pH, temperature or TDS are the main cause of failed broods and adult losses. High temperatures, per Wikipedia, reduce egg survival and raise mortality, so keep parameters stable and avoid mixing with hardier Neocaridina, which prefer very different water.