Prof. Dr. Ioannis Leonardos is a Professor in the Biological Applications and Technology Department, University of Ioannina. He completed his Ph.D. studies at the Laboratory of Ichthyology, Department of Zoology, School of Biology, Faculty of Science, Aristotelian University of Thessaloniki. Before joining the University of Ioannina, he was an Assistant Professor at the Technological Institute of Mesolongi, Department of Aquaculture and Fisheries. His research keywords contain agricultural and biological sciences; environmental science; biochemistry; genetics and molecular biology; pharmacology; toxicology and pharmaceutics; engineering; chemistry; materials science; medicine; physics and astronomy.