It was a great opportunity to work at the Department of Lake and River Fisheries, University of Warmia and Mazury in Olsztyn, Poland from 16th March to 10th May 2015. During my research stay, along with my Polish colleagues we performed few experiments to investigate the effects of ions of ovarian fluids and seminal plasma on the fertilization mechanism of Ide and Northern pike. I was interested to measure and manipulate the duration of egg receptivity of Ide by using different activation media. I have also collected eggs and sperm samples of fish from different families for ultrastructure study. The warm hospitality from our Polish colleagues was highly appreciated.