Crocodile. The land crocodile appears as an unclean beast in the RSV rendering of (Leviticus 11:30). Many scholars assume that the crocodile is the mysterious “Leviathan” (whale, NEB) praised by Job (Job 41:1-34) and mentioned in (Psalm 74:14; 104:26); and (Isaiah 27:1).

Crocodiles used to live in rivers in the Holy Land, including the Jordan, but they have now disappeared from this region. A long, heavy animal, the crocodile has a tough hide covered with overlapping scales. His eyes and nostrils are high on his head; so he can float almost totally submerged. Crocodiles are extremely dangerous, with strong jaws and sharp teeth. They ordinarily eat small animals, birds, and fish, but occasionally will attack larger animals or man.

Source: [Anon-Animals]