Granulation staining and cytochemistry of peripheral blood monocytes in healthy carp (Cyprinus carpioL.) are described. Blood smears were stained for periodic acid‐Schiff (PAS), peroxidase, oxidase, alkaline and acid phosphatase, α‐naphthyl acetate esterase, α‐naphthyl‐butyrate esterase, naphthol‐AS‐chloroacetate esterase (AS‐D), naphthol‐AS‐acetate esterase and β‐glucuronidase. For representation of different granulations triazide‐staining for eosinophil and neutrophil granules and aqueous methylere‐blue staining for basophil granules were used. Lipids were shown by sudan‐black‐reaction. Monocytes showed only basophil granulation and weak lipid reaction. All tested enzymes were detected, with the exception of peroxidase. The PAS reaction f