Azolla Plant

Azolla Plant has enormous potential as a livestock Feed:

Its high content in proteins, essential amino acids, vitamins (vitamin A, vitamin B12, Beta Carotene), growth promoter intermediaries and minerals.
Its ability to proliferate without inorganic nitrogen fertilization.
The aquatic fern Azolla can grow without nitrogenous nutrients because of the presence of the N₂-fixing ability of symbiotic Anabaena. ... The high level of crude protein of Azolla and higher lysine concentration indicated that Azolla plants may be a good source of fish feed.