Sorry but not quite right again buddy -- in this case we again face a translation issue: the "polysacharrides' and "Immunity thingy" are actually referring to
Ganoderma lucidum polysaccharides (GLP). GLP has long been used in traditional Chinese medicine, and is known for its anti-cancer and immunity boosting properties. I think it is derived primarily from certain mushrooms.
If you do a bit more googling you will find many studies, most all of which demonstrate the effectiveness of GLP (though many are in relation to humans and also regarding the tumor fighting ability of GLP's).
But here's one published in the International Journal of Fisheries and Aquatic Studies 2016 that relates to GLP and Grass carp (Ctenopharyngodon idella):
PDF | On Oct 1, 2016, E. Chithra and others published Potential use of Ganoderma lucidum polysaccharides as a feed supplement in diets on survival and growth performance of the grass carp, Ctenopharyngodon idella | Find, read and cite all the research you need on ResearchGate
www.researchgate.net
In case you don't want to read the whole thing here were there findings:
"In conclusion, the present study indicates that supplementation of 1.0 g kg-1 Ganoderma lucidum polysaccharides in Ctenopharyngodon idella diets enhanced the survival and growth performance."
Again plenty more online studies supporting similar, so I'm thinking that while I doubt it's a 'super food', maybe Sianlon Arowana food ain't half bad bro -- leastways no worse than OF AR-G2, which makes some pretty hefty similar claims:
OF® AR-G2 Intense Colour is a premium Arowana carnivorous pelleted feed that excels in all grow-out conditions and enhanced with our proprietary color enhancing, body shaping and fin elongation with OF® OptiAR-X protein linker.
FEATURES
- Enriched with OF® OptiAR-X, a metabolic enhancer that enhances Food Conversion Rate (FCR), increases the palatability, boost growth- fin elongation and body shaping.
- Fortifies immune system, OF® AR-G2 is bio-formulated to fortify the Arowana’s immune system for better health and extra resistance against parasitic sickness, thus reducing mortality.
- Enhances growth through superior digestive performance during high levels of feeding.
- No artificial chemical coloring / enhancer added. Made from natural organic sources.
- Superior color enhancement that intensifies your beloved Arowana’s color pigments.
- Pure animal protein feed that is easily metabolized by the Arowana carnivorous digestive system.