Histochemical Analysis and Distribution of Digestive Enzymes in the Gastrointestinal System of the European Barracuda (Linnaeus, 1758).

In this study, we examined the gastrointestinal tract of the European barracuda () living in the Adriatic Sea near Dubrovnik, Croatia. The study aimed to identify the presence and distribution of four digestive enzymes: alkaline phosphatase, aminopeptidase, acid phosphatase, and non-specific esterase. We found that alkaline phosphatase activity was present in the brush border of the enterocytes in all the investigated intestinal segments.