Researchers at Tel Aviv University and Haifa’s Israel Oceanographic Institute have developed a method to grow huge amounts of seaweed containing all the nutrients to sustain both humans and animals. It utilizes fish wastewater and environmental stress factors to stimulate algae growth.

https://www.jpost.com/environment-and-climate-change/article-716044

https://www.sciencedirect.com/science/article/abs/pii/S1466856422001527