Albert Barnes' Notes on the Whole Bible - Job 41:31
He maketh the deep to boil like a pot - In his rapid motion through it. The word “deep” (מצולה metsôlâh) may refer to any deep place - either of the sea, of a river, or of mire, Psalms 69:2. It is applied to the depths of the sea, Jonah 2:3; Micah 7:19; but there is nothing in the word that will prevent its application to a large river like the Nile - the usual abode of the crocodile.He maketh the sea - The word “sea” (ים yâm) is often applied to a large river, like the Nile or the... read more
The Pulpit Commentary - Job 41:32
He maketh a path to shine after him; one would think the deep to be hoary. He leaves a white trail behind him as he passes from sand-bank to sand-bank through the shallows. It is as if the Nile had grown old and put on hoar hairs. read more