Can I keep a Giant River Prawn in a community tank?

No, it is highly discouraged. They are aggressive predators that will actively hunt and eat smaller fish, snails, and other shrimp. Only very large, fast, top-dwelling fish might be safe.

Why are my prawn's claws orange instead of blue?

Claw colour indicates social status in males. Orange claw males are rapidly growing, sub-dominant individuals. Blue claw males are the fully dominant, sexually mature patriarchs of the hierarchy.

How fast do Giant River Prawns grow?

In warm water with abundant food, they grow incredibly fast. A juvenile can reach an impressive adult size of over 20 cm in well under a year.

Can I breed them in a normal freshwater tank?

No. Although they will mate and produce eggs in freshwater, the hatched larvae (zoeae) absolutely require brackish water to survive their initial life stages.

Do they need to come out of the water?

No, they are fully aquatic. However, they are skilled climbers and notorious escape artists, so a tight-fitting lid is essential to prevent them from climbing out of the aquarium.

FreshwaterTropicalIntermediate

Giant River Prawn

Macrobrachium rosenbergii

An imposing and highly territorial freshwater invertebrate, the Giant River Prawn boasts immense blue claws and a fascinatingly complex social hierarchy.

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Ideal Conditions

Temperature: 25 – 32 °C
pH range: 7 – 8.5
Hardness: 5 – 20 dGH
Adult size: 25 – 32 cm
Large footprint essential for adults: 300 litres+
Lifespan: 2 – 4 years
Diet: Omnivorous/Predatory scavenger
Water flow: Moderate
Preferred setup: Ample hiding places like large PVC pipes, caves, or robust rockwork. Plants are likely to be uprooted or eaten. A tight-fitting lid is mandatory to prevent escapes.

About the Giant River Prawn

The Giant River Prawn is arguably the most famous freshwater crustacean in global aquaculture, renowned both as a food source and an impressive display animal. Reaching lengths of over 30 cm—excluding their massive chelipeds (claws)—they command absolute authority over the aquarium floor. While they are often sold small in the trade, they grow rapidly and require dedicated setups to thrive and prevent predatory destruction of community tanks.

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Is it right for your tank?

Check Giant River Prawn against a habitat you already keep. We compare water type, temperature, pH, adult size, group needs and everything living there.

Where Giant River Prawn comes from

Native range

South Asia, Southeast Asia, Northern Oceania

Countries / regions

India, Bangladesh, Thailand, Malaysia, Indonesia, Philippines, Papua New Guinea, Australia

Habitat

Turbid freshwater rivers, streams, and lakes connected to the sea, migrating to estuaries for reproduction.

Widely introduced globally for aquaculture, often establishing invasive populations in suitable tropical and subtropical climates.

Similar species

Red Claw Crayfish
Cherax quadricarinatus
Chameleon Shrimp
Macrobrachium scabriculum
Vampire Shrimp
Atya gabonensis

We’re adding more full species guides as the catalogue grows.

Compatible tank mates

Reviewed guidance based on this species' recorded traits.

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Giant Danio
Devario aequipinnatus
Fast-moving and dwells in the upper water column, keeping them mostly out of the prawn's reach, though opportunistic strikes remain a minor risk.
Compatible with caution
Tinfoil Barb
Barbonymus schwanenfeldii
Large and robust enough to avoid predation, but may attempt to pick at the prawn when it is vulnerable during a moult.
Compatible with caution
Corydoras Catfish
Corydoras spp.
Small bottom-dwellers that will quickly be captured and eaten by the prawn.
Not recommended
Cherry Shrimp
Neocaridina davidi
Viewed entirely as a food source by this large, predatory species.
Not recommended
Betta
Betta splendens
Slow-moving with trailing fins, making them an extremely easy and highly vulnerable target for the prawn's claws.
Not recommended

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