Paraffin sections from decalcified heads of Poecilia reticulata (microsmatic fish) and Carassius auratus (macrosmatic fish) were processed to immunocytochemically detect ensheathing cell markers used in research on mammals: GFAP, S100, NCAM, PSA-NCAM, vimentin, p75NTR and galectin-1.     ///    "P75NTR staining is more evident in Poecilia, PSA-NCAM positivity in Carassius. "