Given the adequate dietary supplementation of essential amino
acids and taurine, longfin yellowtail seems to have a tolerance for high
SPC inclusion in the diet. The similarities in intestinal cell and tissue integrity among fish from the all dietary treatments further corroborate
this capacity, which is similar to what was observed in yellowtail
kingfish when fed diets with increasing content of SPC as replacement
of FM (Bowyer et al., 2013). In the present study, mucosal folds of fish
from each treatment were well-individualized, with high densities of
goblet cells present in all groups. There were a few morphological
changes observed, but these were minimal and did not appear to
directly correspond to FM replacement level, with no obvious signs of
enteritis noted in any group.