Red cherry shrimp (Neocaridina davidi) are the easiest freshwater invertebrate to breed — but there's a real difference between "they multiplied" and running a colony that stays deep red, healthy and productive for years. This is the detailed version, from sexing to grading.
Sexing your shrimp
| Female | Male | |
|---|---|---|
| Size | Larger, 2.5–3 cm | Smaller, 2–2.5 cm |
| Colour | Deep, opaque red | Paler, often translucent |
| Body | Curved underbelly; saddle or eggs visible | Slimmer, straight profile |
The yellow "saddle" behind a female's head is her ovaries — when you can see it, she's preparing to breed.
The breeding cycle: moult → berried → hatch
- Moult: the female sheds her shell and releases pheromones — you'll see males swimming frantically. Never panic-remove a "dead shell"; leave moults in the tank, shrimp eat them for calcium.
- Berried: within hours she carries 20–30 eggs under her tail, fanning them constantly for oxygen.
- Hatch: 3–4 weeks later (faster at 24–26°C), fully-formed shrimplets emerge — no larval stage. They hide in moss for their first weeks eating biofilm.
Conditions that maximise output
- Temperature 22–26°C · pH 6.8–7.6 · GH 6–8 (see minerals)
- Mature tank, gentle sponge filter, zero copper anywhere
- Protein-rich breeding food 2–3× weekly — berried females need the nutrition
- No predators — a species-only tank easily triples shrimplet survival
General colony-building strategy is covered in How to breed shrimp into hundreds.
Keeping the red RED: grading and culling
Left alone, a red colony slowly drifts paler because low-grade genes accumulate. Every month or two, move the palest individuals to a second tank (or rehome them). Grades run from basic Cherry → Sakura → Fire Red → Painted Fire Red, where even the legs are solid red. Ten minutes of selection per month keeps a colony looking premium.
Don't mix colours: all Neocaridina interbreed and offspring revert toward wild brown. One colour per tank — if you love blues too, run a second tank (see our Blue Cherry guide).
FAQ
My female dropped her eggs — why?
Stress: a parameter swing, bad moult or harassment. Fix stability first; first-time mothers also occasionally drop a clutch — she'll do better next cycle.
How fast do shrimplets grow?
Sexually mature at ~4–5 months. That's why one berried female in month 1 becomes a self-sustaining colony by month 6.
Start with quality stock
Breeding quality starts with genetics. Our Sydney-bred cherry shrimp — including Fire Red and Bloody Mary lines — ship healthy with a Live Arrival Guarantee. Day-to-day care lives in Shrimp Care 101.
