Various studies on spirulina as an alternative feed for animal and aquaculture were done.  Spirulina can be fed up to 10% for poultry  and less than 4% for quail.  Increase in the spirulina content up to 40g/kg for 16 days in 21-day-old broiler male chicks, resulted in yellow and red coloration of flesh and this may be due to the accumulation of the yellow pigment, zeaxanthin.  Pigs  and rabbits  can receive up to 10% of the feed and increase in the spirulina content in cattle resulted in increase in milk yield and weight.    Spirulina as an alternative feedstock and immune booster for big-mouth buffalo,  milk fish,  cultured striped jack,  carp,   red sea bream,  tilapia,  catfish,  yellow tail,  zebrafish,  shrimp,   and abalone  was established  and up to 2% spirulina per day in aquaculture feed can be safely recommended.