Fish oil replacement but what the prawn need is a fish meal alternative…

https://phys.org/news/2022-07-deep-sustainability-alternative-aquaculture-ingredient.html

Plant-based faux (imitation) prawns could protect the marine environment…as can shrimp from RAS…and perhaps even more sustainably…

https://ethz.ch/en/news-and-events/eth-news/news/2022/07/plant-based-prawns-to-protect-the-marine-environment.html

Wastewater treatment technology based on algal bioremediation…a future prawn treat.

https://www.sciencedirect.com/science/article/abs/pii/S0048969721006239