Vena Haynes was recently awarded the EPA STAR Fellowship for her environmental toxicology research with Dr. J. Evan Ward. Vena is a PhD student in the UConn Marine Sciences program, where her research is focused on the effects of environmental pollutants on marine food webs. Manufactured nanomaterials are entering aquatic environments from product usage, industrial waste, and wastewater treatment plant effluents. Specifically, titanium dioxide nanoparticles found in consumer products, such as sunscreen and personal care products, can be toxic to organisms and its toxicity can increase with exposure to light. Very little research has been done on the effects of these nanoparticles in the marine environment with exposure to natural light. The objective of this project is to examine the effects of titanium dioxide nanoparticles on ecologically important food web grazers that inhabit coastal waters, using environmentally relevant experimental conditions. This work will aid in the development of safer nanomaterials and help predict impacts on grazer populations and organisms that rely on grazers for food (primarily fish).