Japan investigating fishmeal substitutes for prawn feed…

https://www.seafoodsource.com/news/aquaculture/japan-investigates-fishmeal-substitutes-in-aquaculture-feed

Bio-economic analysis of super-intensive closed prawn farming in Japan…RAS tech running 20+ years now.

https://www.globalseafood.org/advocate/bio-economic-analysis-of-super-intensive-closed-shrimp-farming-in-japan/