Marine snow is not frozen weather falling through seawater. The name describes material sinking from upper waters towards the deep ocean, making an otherwise hidden connection easier to picture.
Follow the material downwards
NOAA describes marine snow as a shower of organic material. It can include remains and wastes from organisms above, and provides food for life in deeper water.
That description invites a vertical view of the ocean. Surface activity and deep habitats are connected by more than the horizontal movement visible from shore.
Make a deliberately simple sketch
Draw an upper layer, a deeper layer and a few downward arrows. Label the arrows “sinking material”, not “all material reaches the bottom”. The sketch represents a connection rather than a measured account of how much arrives at any depth.
If a source gives a rate or quantity, retain its location, depth and measurement period. Do not treat one figure as a universal value for every sea.
Keep the illustration separate from evidence
The accompanying coastal artwork is a thematic illustration, not an underwater observation of marine snow. An actual research image needs its own caption and context.
Compare the downward connection with upwelling’s connection between depth and surface. Following the direction of movement is a useful first step towards asking what is being transported.