Marine Biology is one of the most interdisciplinary, fascinating and important subjects in natural sciences. The present-day Renaissance of marine biology research mirrors our growing understanding and concern about the critical roles of the oceans and their inhabitants in the past, present and future of the biosphere and the humankind. The importance of the oceans for the biosphere and the humanity is reflected in the fact that 2021-2030 has been proclaimed a  Decade of Ocean Science for Sustainable Development by UNESCO  https://www.oceandecade.org/   A degree in marine biology provides an entry point to the research- or application-oriented careers that focus on the scientifically and societally important issues such as assessment of the impacts of the global climate change, eutrophication and pollution on marine ecosystems and development of the sustainable solutions to mitigate these problems.