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Scampi (Giant Prawn) Cultivation: Sowing to Sale

A hands-on guide for growers on establishing and managing scampi (giant prawn) production from broodstock and hatchery through grow-out, harvest and market-ready sales.

Ranjeet Natarajan
Ranjeet Natarajan August 9, 2026 6 min read 1,058 words
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Scampi (Giant Prawn) Cultivation: Sowing to Sale

Overview

Scampi, commonly called giant freshwater prawn (eg. Macrobrachium spp.), is a high-value aquaculture species suited to pond, tank and cage systems. Successful production rests on managing water quality, reliable seed supply, stable nutrition and careful harvesting and marketing. This guide walks through practical steps a grower needs from broodstock and hatchery to harvest and selling.

Site selection and infrastructure

  • Water source: Reliable access to clean, disease-free water year-round. Groundwater or well water is preferred if it has stable temperature and low contaminants. Surface water needs settling, filtration and possibly disinfection before use.
  • Topography and soil: Flat land with clayey soil for earthen ponds or stable ground for tanks. Good drainage for drying ponds between crops.
  • Utilities: Electricity for aeration, pumps and hatchery equipment. Backup power plans are essential for emergency aeration.
  • Biosecurity: Control access, supply dedicated footwear, and minimize wild-animal and bird entry. Isolate hatchery and nursery from grow-out units to reduce pathogen transfer.

Broodstock and hatchery basics

Reliable seed (PL—postlarvae) is the backbone of a commercial operation. Options include maintaining an on-farm hatchery or sourcing PL from reputable hatcheries.

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  • Broodstock selection: Choose healthy, sexually mature prawns with good growth history. Maintain separate tanks for males and females during conditioning. Feed high-protein diets and offer vitamin supplements to improve fecundity.
  • Spawning: Monitor females for berried (eggs attached) condition. Use controlled lighting and stable water quality to promote spawning.
  • Larval rearing: Larvae require brackish water initially (for many Macrobrachium spp.) and specific larval feeds. Maintain stable salinity and high-quality rotifer and Artemia cultures or commercial larval diets where appropriate.
  • Nursery/PL production: After metamorphosis to PL, move animals to nursery tanks or hapa nets with dense aeration and soft feeds to grow PL to robust sizes before stocking into grow-out ponds.

Grow-out systems and stocking

Grow-out can be done in earthen ponds, lined ponds, tanks or cages. Choose system according to capital, water availability, and labour.

  • Stocking density: Keep densities compatible with system and aeration capability. Lower densities reduce aggression and improve survival; intensive systems need robust aeration and frequent monitoring.
  • Pond preparation: Dry and lime ponds between crops, establish plankton by fertilization (if relying on natural productivity), and ensure structural integrity of inlet/outlet channels. Provide shelters (bundles of bamboo, PVC pipes) if using extensive/semi-intensive methods to reduce cannibalism and improve survival.
  • Aeration: Aeration is critical in intensive and semi-intensive systems. Night-time DO drops are common—plan aeration schedules and backup power.

Water quality management

Consistent water quality is one of the most practical things you can control to improve survival and growth.

  • Key parameters: Monitor temperature, dissolved oxygen (DO), pH, ammonia (NH3/NH4+), nitrite, and alkalinity. Aim for stable temperatures and DO above species-appropriate minimums (use local extension guidance for precise targets).
  • Routine checks: DO and temperature daily; pH and ammonia at least weekly during critical phases. Adjust water exchange, aeration and liming based on results.
  • Water exchange and filtration: Use settling basins and screens to avoid introducing pathogens. Partial water exchanges can correct poor conditions but plan exchanges to avoid stressing stock.

Nutrition and feeding strategy

Nutrition drives growth and feed conversion. Use commercial pellets formulated for penaeid/prawn species where available and complement with natural productivity in ponds.

  • Feed composition: Diets should be balanced for protein, lipids, vitamins and minerals. Feed particle size should match prawn size and be changed as prawns grow.
  • Feeding frequency: Multiple small feedings per day reduce waste and aggression. Observe feeding behaviour and adjust quantities; uneaten feed indicates overfeeding.
  • Supplemental feeds: Consider live feeds during early stages (in hatchery/nursery), and plant/animal-based supplements (vegetable matter, fish silage) only when proven safe and nutritionally adequate.

Health, disease prevention and management

Prevention is far more effective than treatment. Maintain strong biosecurity and stress-reduction practices.

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  • Quarantine new stock: Isolate and observe new broodstock or PL before introducing to main systems.
  • Monitor behaviour: Reduced feeding, abnormal swimming or lesions are early warning signs. Keep mortality records to track trends.
  • Common issues: Bacterial infections, fungal hyphae on damaged tissue, and parasitic infestations can occur. Work with local aquatic veterinarians or extension services for diagnosis and targeted treatments. Do not apply antibiotics without professional guidance and observe withdrawal periods.
  • Sanitation: Clean equipment, disinfect nets, and avoid using the same tools between hatchery and grow-out areas unless sanitized.

Harvesting and post-harvest handling

Plan harvest based on market size and price. Gentle handling preserves quality and reduces losses.

  • Harvest methods: Draining ponds, netting, or seine harvest are common. Harvest at cooler times of day to reduce stress.
  • Grading and holding: Grade by size if required by buyers. Hold prawns in well-aerated tanks with stable water quality prior to transport.
  • Cooling and transport: Rapid chilling on ice or in chilled water reduces bacterial growth. Transport in aerated tanks or insulated boxes with ice, following buyer specifications.

Marketing and selling

Selling strategy affects returns as much as production efficiency. Know local and export market requirements.

  • Identify buyers: Supermarkets, restaurants, processors or live markets each have different size, quality and packaging requirements.
  • Quality standards: Consistent sizing, low mortality, minimal shell damage and proper chilling increase value. Documentation of production practices, traceability and responsible use of inputs helps with market access.
  • Value-adding options: Grading, live sale, fresh-on-ice packing, or simple processing (head-on/head-off) can fetch higher prices. Assess labour and infrastructure before adding steps.

Record keeping and economics

Track inputs (seed, feed, fertilizers), mortalities, growth rates, water quality events and sales. Records identify weak points and inform improvements.

  • Key records: Stocking dates/densities, feed amounts, aeration/power outages, water quality checks, mortalities, harvest weights and sales prices.
  • Cost control: Feed and fingerling costs are often the largest inputs. Improved feed management and reliable seed supply typically raise profitability more than expanding area.

Practical tips from growers

  • Start small with one or two ponds or tanks to learn system-specific issues before scaling up.
  • Invest in reliable aeration and a backup power source; lack of oxygen causes rapid, catastrophic losses.
  • Build relationships with dependable PL suppliers or develop modest hatchery capacity to reduce seed variability.
  • Work with local extension and fellow growers to share observations on disease, feeds and market demand.

Conclusion

Scampi cultivation can be profitable where growers focus on reliable seed, steady water quality, appropriate feeding and good biosecurity. Practical management, consistent records and matching production to market demand are the steps that turn production into sustainable income.

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Ranjeet Natarajan
Ranjeet Natarajan

Contributing writer at Agriculture Novel — telling the stories that sustain us.

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