Functional diets that include bioactive
ingredients have been shown
to increase disease resistance and
growth in fish. Among the dietary
options is the use of seaweed,
which offers both essential nutrients
and biologically active metabolites.
In a study, Atlantic salmon
fed diets with red seaweed had
significantly higher levels of antiviral
activity against the infectious
salmon anemia virus than fish fed a
control diet. Growth performance
improved or was not negatively
affected by the inclusion of seaweed
in the diets.