King prawn

What to check for

Location

All areas, Scotland

Production method

Closed system, RAS

Rating summary

King prawns farmed in UK recirculating aquaculture systems are a good choice. They have relatively low requirements for fishmeal and fish oil. Being that RAS is a closed-loop system, there is minimal environmental impact, or risk of escapes, disease, and predator interactions. Although currently at low production volumes, this method is well regulated and managed, but remains uncertified.Rating last updated November 2025.

Technical consultation summary

King prawns farmed in UK recirculating aquaculture systems are a good choice. They have relatively low requirements for fishmeal and fish oil, with an FFDR value estimated below 0.5, and are fed a diet inclusive of alternative and novel protein sources. Being that RAS is a closed-loop system, there is minimal environmental impact, or risk of escapes, disease, and predator interactions. Juveniles for this production system are sourced from hatcheries, so wild populations are unaffected. Although currently at low production volumes, this method is well regulated and managed, but remains uncertified.