**About the Editors**

**Tom Turk** Ph. D., 1959. He obtained his Ph. D. 1992 at the University of Ljubljana. His Ph.D. thesis was on microbial enzymology in denitrification. Most of his research was conducted at the Graduate Department of Biochemistry, Brandeis University, Waltham, Ma., USA. His later research was dedicated to cytolytic toxins from sea anemones and other organisms, predominantly fungi which harbor cytolytic compounds. In the following years, he studied different aspects of marine natural compounds, mainly those isolated from sponges, among them the biological activity of alkylpyridnium polymers from marine sponge Reniera sarai. Currently, his main focus and the core of his interest is in the possible application of these compounds as antifouling agents and in the development of anticancer drugs for the treatment of certain types of lung cancer. He was a visiting professor at University of Florida, Gainesville, Fl. USA. Currently, he holds a position as a full-time professor of Biochemisty at the University of Ljubljana, Slovenia.

**Joana Reis Almeida** Biomedical Sciences Ph. D. (2012, ICBAS—University of Porto), is Assistant Researcher at the Interdisciplinary Center of Marine and Environmental Research, University of Porto (CIIMAR-UP), and Invited Assistant Professor at the Faculty of Sciences, University of Porto (FCUP-UP). She works in the areas of natural sciences, environmental sciences, marine biology, and blue biotechnology, and her current research interests focus on marine biofouling and the search for eco-efficient antifouling strategies based on new alternative environmentally compatible products. She currently leads a research team focusing on new bio-inspired antifouling strategies and related environmental aspects. She has published over 20 papers in ISI journals and has two patents on antifouling bioactivity of new compounds. She is the Principal Investigator of the project NASCEM (FCT-PT) on the bioprospection of alternative and sustainable antifouling compounds, and has been part of several national and European research projects on biotechnological applications of natural products, and also in cooperation with sustainable aquaculture industry for antifouling infrastructure improvement.
