Stefan Anjus investigates freshwater sponges, macroinvertebrates, and fish and participates in caving, diving, and rock climbing. Stefan Andjus has a PhD in biology and ten years of hydroecology lab-work and fieldwork within the field of freshwater ecosystems. From 2011 – 2013 he had been employed at the Belgrade Institute for Public Health, Laboratory for Human Ecology and Ecotoxicology as a laboratory assistant working on drinking water quality and ecological status assessment of inland waterbodies, based on microbiological indicators. At present, since 2013, he works at the University of Belgrade, Institute for Biological Research “Siniša Stanković”, as Research Associate in the Department of Hydroecology and Water Protection. Has experience in biomonitoring, research of ecological interactions within macroinvertebrate communities in aquatic ecosystems. Skilled in species identification and phylogeny, applying both traditional and molecular taxonomy methods, acquired through his studies on freshwater Spongillidae of the Balkan Peninsula. He has been an active participant on various research missions aimed at comprehending and preserving aquatic ecosystems and his contribution encompass a range of national and international projects such as GLOBAQUA (FP7 – the Seventh Framework Programme project of the European Commission) and JDS (Joint Danube Survey 3, ICPDR, International river expedition).