Shrimp Gestation Calculator
This dwarf shrimp gestation calculator finds the expected hatch date instantly. Select your species and enter the date a female became berried to calculate the hatch date and view key milestones.
Quick Answer
Dwarf shrimp gestation (the "berried" period) averages 30 days, ranging 21–35 days by species. Select your species above for an exact expected hatch date.
Cherry Shrimp Gestation Calculator
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What "Berried" Means
A berried female is one carrying a visible cluster of eggs tucked under her abdomen, held in place by her swimmerets (small paddle-like limbs). The term comes from the eggs' resemblance to a cluster of berries, and it's the standard word breeders use instead of "pregnant" for shrimp. A berried female constantly fans her swimmerets to keep oxygenated water flowing over the eggs — a behavior you can watch happening continuously once you know to look for it.
Shrimp Species & Gestation Length
| Species | Avg. Gestation |
|---|---|
| Cherry Shrimp | 30 days |
| Crystal Red Shrimp | 30 days |
| Ghost Shrimp | 22 days |
| Blue Velvet Shrimp | 30 days |
| Bamboo Shrimp | 30 days |
| Amano Shrimp (brackish larvae) | 35 days |
Why Amano Shrimp Are Hard to Breed
Amano shrimp larvae hatch as free-swimming, plankton-like stages that require brackish (part-saltwater) conditions to survive and develop — a full marine or freshwater tank won't work for this stage. Successfully raising Amano shrimp larvae to the juvenile stage requires a dedicated brackish rearing setup that most home aquarists don't maintain, which is a key reason most Amano shrimp sold in stores are wild-caught rather than tank-bred, despite the species being extremely popular for algae control.
Temperature Effect on Gestation
| Water Temperature | Approx. Berried Period |
|---|---|
| 72°F (22.2°C) — Cooler | ~35 days |
| 78°F (25.6°C) — Warmer | ~25 days |
Moulting Risks During Pregnancy
A berried female can lose her entire clutch if she molts while carrying eggs, since the eggs are attached to the exoskeleton she's shedding — this is one of the more common causes of an unexpectedly failed berried period. Stable, low-stress water conditions and consistent parameters help minimize unnecessary molting during pregnancy, since molting is often triggered by stress or sudden water changes.
Shrimplet Care & Water Quality
Shrimplets need no special food — they graze on biofilm, the natural layer of microorganisms and algae that coats surfaces in an established, mature aquarium. This is part of why a tank with some age and established biofilm on hardscape and plants supports shrimplet survival far better than a brand-new setup.
Water quality is crucial throughout — shrimp are notably sensitive to ammonia, nitrite, and copper, tolerating far less than most fish. Copper in particular is highly toxic to shrimp and other invertebrates even in trace amounts completely harmless to fish, so shrimp keepers need to check fertilizer and medication labels carefully and use copper-free products.
Community Tank Considerations
Even peaceful community fish can pick off newly released shrimplets, which are tiny and defenseless in their first days of life. A species-only shrimp tank, or one with only very small, non-predatory tankmates and dense plant cover, gives shrimplets the best odds of surviving to adulthood.
How Shrimp Gestation Compares Across Species
| Species | Avg. Gestation |
|---|---|
| Cherry Shrimp | 30 days |
| Ghost Shrimp | 22 days |
| Crystal Red Shrimp | 30 days |
| Amano Shrimp | 35 days (brackish larvae) |
How We Calculate Shrimp Gestation
The calculator uses the formula: Hatch Date = Berried Date + selected species' average gestation days, drawn from published aquaculture and hobbyist breeding references.
Frequently Asked Questions
What does 'berried' mean in shrimp?
A berried female is one carrying a visible cluster of eggs tucked under her abdomen, held in place by her swimmerets (small paddle-like limbs). The term comes from the eggs' resemblance to a cluster of berries. Berried is the standard term breeders use instead of 'pregnant' for shrimp.
How can I tell if my shrimp is berried?
Look underneath the female's abdomen for a visible cluster of small, round eggs, often olive-green, yellow, or grey depending on species and how far along development is. A berried female also constantly fans her swimmerets to keep oxygenated water flowing over the eggs — a behavior you can watch happening continuously.
How long are shrimp eggs before hatching?
Most dwarf shrimp — Cherry, Crystal Red, Blue Velvet, and Bamboo shrimp — carry eggs for about 30 days on average, with a range of 25–35 days. Ghost shrimp are notably faster at 21–24 days, while Amano shrimp take the longest at around 5 weeks, complicated further by their larvae needing brackish water.
Why are Amano shrimp hard to breed in a home aquarium?
Amano shrimp larvae hatch as free-swimming plankton-like stages that require brackish (part-saltwater) conditions to survive and develop — a full marine or freshwater tank won't work. Successfully raising Amano shrimp larvae to the juvenile stage requires a dedicated brackish rearing setup, which is why most Amano shrimp sold in stores are wild-caught rather than tank-bred.
Does water temperature affect shrimp gestation length?
Yes. Warmer water speeds development and shortens the berried period, while cooler water slows it down — a shift of several degrees can meaningfully change how many days pass between berrying and hatch, similar to the pattern seen in livebearer fish.
Is molting dangerous for a pregnant shrimp?
Yes, moderately. A berried female can lose her clutch if she molts while carrying eggs, since the eggs are attached to the exoskeleton she's shedding — this is one of the more common causes of an unexpectedly failed berried period, and stable, low-stress conditions help minimize unnecessary molting during pregnancy.
What do baby shrimp (shrimplets) eat?
Shrimplets need no special food — they graze on biofilm, the natural layer of microorganisms and algae that coats surfaces in an established, mature aquarium. This is part of why a tank with some age and established biofilm on hardscape and plants supports shrimplet survival far better than a brand-new setup.
Why is copper dangerous for shrimp?
Copper is highly toxic to shrimp and other invertebrates even in trace amounts that are completely harmless to fish. Many fertilizers, medications, and even some tap water sources contain copper, so shrimp keepers need to check ingredient labels carefully and use copper-free products in any tank housing shrimp.
Sources & References
- Merck Veterinary Manual — Aquatic invertebrate biology
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Kanika
Researched and reviewed by Kanika, founder of GestationCalc. All gestation data is verified against primary veterinary and agricultural sources before publication.
Last reviewed: September 3, 2026