There are lots of things that can strike fear into the heart or mind or spirit of the human experience. Deadly creatures particularly, even small ones. Fear & respect in the right measure can be a very good & very dependable thing & so much better than false bravado & ignorance.
If the lion is the king of the jungle then I would say that the crocodile is the king of the river, powerful, fast, stealthy & deadly.Humans have their rich & powerful also & they ought to realise that they are accountable before a holy & almighty God.
Commentary on Ezekiel 32:1-16
(Read Ezekiel 32:1-16)
It becomes us to weep and tremble for those who will not weep and tremble for themselves. Great oppressors are, in God's account, no better than beasts of prey. Those who admire the pomp of this world, will wonder at the ruin of that pomp; which to those who know the vanity of all things here below, is no surprise. When others are ruined by sin, we have to fear, knowing ourselves guilty. The instruments of the desolation are formidable. And the instances of the desolation are frightful. The waters of Egypt shall run like oil, which signifies there should be universal sadness and heaviness upon the whole nation. God can soon empty those of this world's goods who have the greatest fullness of them. By enlarging the matters of our joy, we increase the occasions of our sorrow. How weak and helpless, as to God, are the most powerful of mankind! The destruction of Egypt was a type of the destruction of the enemies of Christ.
Ps 33:8-9. Let all the earth fear the LORD; let all the people of the world revere him. For he spoke, and it came to be; he commanded, and it stood firm.