1, family and genus are different: cereal worm, scientific name Nereis, belongs to polychaete in annelids and is an aquatic animal like centipede. Sandworm, also known as intestinal worm, is a very delicious seafood variety, which grows on coastal beaches.

2. Different shapes: The morphological characteristics of cereal insects are obvious body segments, and warty feet with bristles protrude from both sides of the body segments. The shape of a worm is similar to a long tube, and its shape is long.