Plates 1-4: Guppy gill cell stained with 15% giemsa and observed under Zeiss Axio Imager microscope at 63x/1.4 oil immersion. 1: Micronucleated polychromatic cell (arrow) 2: Binucleated normo-chromatic cell (arrow) 3: Binucleated polychromatic cell (arrowhead); Normal cell with distinct cytoplasm (arrow) 4: Micronucleated Normal cell (arrow). Scale bars = 10μm each