Vasil Kostadinov Atanasov completed his master's degree in 1984 at the Higher Institute of Zootechnics and Veterinary Medicine, Stara Zagora, Bulgaria, majoring in Animal Engineering. The same year, after successfully passing a competition, he was appointed as an assistant at the Department of Biochemistry of the Higher Institute of Zootechnics and Veterinary Medicine. In 1990, he was promoted to the title of Principal Assistant, and, in 2001, to the title of Associate Professor of Biochemistry. In 1996, he defended a dissertation for obtaining the scientific and educational degree "Doctor" under code 01.06.10 "Biochemistry", and, in 2005, a dissertation for obtaining the scientific degree "Doctor of Agricultural Sciences". In 2007, he was promoted to the title of "Professor" in the scientific specialty 01.06.10 "Biochemistry". He has been the leader of numerous projects related to fish reproduction, environmental pollution, and antioxidants. His research interests include the following keywords: reproduction, antioxidants, heavy metals, environmental pollution, and hydrobionts.