Re-Circulatory Aquaculture System (RAS)

Category: Agriculture / Fisheries

  • RAS is an intensive aquaculture technology in which water is continuously filtered, treated and reused.
  • It allows fish production with considerably less water than conventional aquaculture.
  • Important components include mechanical filtration, biological filtration, aeration/oxygenation and water-quality monitoring.
  • RAS permits high-density fish farming and can be used in areas with limited water availability.
  • Under Pradhan Mantri Matsya Sampada Yojana (PMMSY), RAS is supported as a high-density aquaculture technology.
  • Government data reported approval of 12,000 RAS units with a total cost of ₹902.97 crore during 2020–21 to 2024–25.

Prelims Pointers: Principle → Reuse of treated water | Sector → Fisheries | Scheme → PMMSY.