Which physical action describes the process a walrus uses to draw food into its mouth from the sediment?

Answer

A powerful suction action similar to a giant, fleshy straw

The extraction process involves using a powerful suction action, creating negative pressure by rapidly changing the volume of the mouth cavity, which is compared to using a giant, fleshy straw.

Which physical action describes the process a walrus uses to draw food into its mouth from the sediment?
dietanimalmammalwalrus