_:b1218284 "Wikipedia:Marine_snow"^^ . _:b1218284 "PLB:plb"^^ . _:b1218284 . _:b1218284 "Marine snow is a continuous shower of mostly organic detritus falling from the upper layers of the water column. Its origin lies in activities within the productive photic zone."^^ . _:b1218284 . _:b1218284 .