Nucleotide supplementation significantly (P< 0.05) increased fold height in the proximal intestine,
and enterocyte height in the pyloric caeca, proximal and distal enteric sections. A significantly (P< 0.05)
higher microvilli height was observed in all evaluated enteric sections of fish fed with diets supplemented
with nucleotides. It is therefore possible to use dietary nucleotides supplementation to significantly
enhance the intestinal structure of red drum. Likewise, nucleotides in the diet may improve some
components of the non-specific immune response of this sciaenid fish