'Muddy' in the Bible

"Son of man, sing a lament for Pharaoh king of Egypt, and say to him: "'You were like a lion among the nations, but you are a monster in the seas; you thrash about in your streams, stir up the water with your feet, and muddy your streams.

Is it not enough for you to feed on the good pasture, that you must trample the rest of your pastures with your feet? When you drink clean water, must you muddy the rest of the water by trampling it with your feet?