is it loud, is it silent, what other non-biological sound sources are present, can we detect anthropogenic activity? The quality of the acoustic environment is likely to be a highly relevant habitat parameter [...] supply of material from the sea surface. To date, we do not know how global change and increasing anthropogenic activities in the Arctic affect processes on the seafloor. Due to this strong link between surface [...] ing and filming the seafloor, non-invasive observations of megafauna, phytodetrital patches, anthropogenic litter and habitat features such as dropstones. For more info on OFOS see: FRAM featu- red technology