Golding accomplishes three things with his one-page description of Simon's dead body being claimed by the oncoming tide. First, he culminates the role of Simon as Christ-figure in the book. Second, he contrasts the purity of nature with the depravity of humanity. Third, he allows a fitting period of mourning that impresses upon the reader the impact of the murder.
Golding takes great pains to establish Simon as a Christ-figure. He "feeds the five thousand" when he passes fruit down to an endless sea of littluns. He is tempted by the devil in his interaction with the Lord of the Flies. And when he appears during Jack's feast, he is "crying out something about a dead man on a hill." Simon, the most innocent and spiritual of all the boys, dies at the hands of a vicious mob while trying to bring them the good news about the beast. Thus, Golding completes the comparisons between Simon and Jesus by having him prepared for burial. Unlike Jesus, Simon has no devoted women followers to apply spices and wrap his body for burial, but the "strange, moonbeam-bodied creatures with fiery eyes" cover him "with a coat of pearls."
Second, the poetic and mystical description of the sea and its luminescent creatures provides a stark contrast to the horror of the crazed mob that killed Simon. Everything described is a picture of light and purity: the twinkling stars, the "layer of silver" light, and the "advancing clearness" of the ocean water. Nature is serene and unsullied, despite man's evil. Golding is making the point that people are not corrupted by their environment; the corruption comes from within them. This scene testifies to that truth by providing a sharp contrast between the darkness of humanity and the light of nature.
Finally, Golding gives readers a chance to mourn for Simon and to contemplate the tragedy that has just happened. In later chapters, the boys themselves refuse to acknowledge Simon's death or mourn his passing. Readers need a chance to feel the awfulness of the murder and to honor Simon's life, and this scene provides that.
In this poetic interlude describing how nature disposes of Simon's corpse, Golding emphasizes Simon as a Christ-figure, reinforces the theme that human depravity comes from the inside rather than from the outside, and allows readers to mourn a sympathetic character while feeling the import of the boys' violence toward him.
Simon's burial at sea is done with a mystical fashion. The boys abandon him there, and the sea takes over the burial rights.
There are glowing sea creatures surrounding his body, the water cleanses or purifies him as the blood is washed away, and the tides sweep him out to the sea. The mysticism of the moment-a force we cannot see, takes care of the burial ritual.
-I dont know :O