This document discusses the SCAR-MarBIN (Marine Biodiversity Information Network) project which aims to quantify Antarctic marine biodiversity. It notes that Antarctic biodiversity is highly endemic but understudied, especially in deep-sea environments. SCAR-MarBIN builds an open-access network of over 60 editors to aggregate data on over 16,000 Antarctic taxa and 9,234 species from 130 datasets. The project helps identify gaps in knowledge, promotes new initiatives to increase data, and builds bridges across disciplines and nations to advance conservation and management of Antarctic ecosystems.