We are a scientist team from Université du Québec à Rimouski (UQAR) led by Professors Michel Gosselin and André Rochon. The team also comprises Kaven Dionne (postdoctoral researcher) and Coralie Voyer (student researcher in 2019); another student researcher might join us in 2020 (to be confirmed). As part of the Coastal Environmental Baseline Program of Fisheries and Oceans Canada, we propose to study the microscopic algae in the water of Frobisher Bay, near Iqaluit, Nunavut, in August 2019 and in September 2020. The objective of our scientific project would be to identify and describe the microscopic algae species present in Frobisher Bay, near Iqaluit. This project would help us to complete an algae species database that would be used to detect the introduction of new or toxic algae species in the Frobisher Bay region and in other ports in the Canadian Arctic. We would sample algae from a boat chartered from Alexander Flaherty (Polar Outfitting, Iqaluit) at different locations in Koojesse, Peterhead and Tarr Inlets (23 locations in total). We would not take any sample from protected areas. At each location, we would sample algae from the water column using 1) a small plankton net (mouth diameter = 0.3 m; height = 0.9 m) and 2) a 5 L bottle followed by filtrations. We would also sample algae from the first few centimeters of sediments at the bottom of the water on an area about 0.04 m2 using a small grab sampler. Each year, our sampling campaign would last about 3 to 4 days, mainly depending on weather, and would involve 2 researchers from UQAR and 1 Iqalummiuq (beside Alexander Flaherty).Sample collection does not involve tagging or fishing, and any bycatch would be released as soon as possible with minimum stress. Because the samples we would take would be very small, we expect that the impact of our project on the environment would be negligible. The 2 researchers from UQAR would perform laboratory analyses and would be lodged at the Nunavut Research Institute of Iqaluit. We would bring back to UQAR filters with algae on them and sediment pellets to be processed at UQAR for further analyses. Our results would be made available to the public through websites and through a public presentation in Iqaluit at the end of the project. We expect to publish the findings of this work in peer-reviewed scientific journals.