Behemoth (very likely a sauropod like Brachiosaurus)
Job 40:15 “Behold, Behemoth, which I made as I made you; he eats grass like an ox.
Job 40:16 Behold, his strength in his loins, and his power in the muscles of his belly.
Job 40:17 He makes his tail stiff like a cedar; the sinews of his thighs are knit together.
Job 40:18 His bones are tubes of bronze, his limbs like bars of iron.
Job 40:19 “He is the first of the works of God; let him who made him bring near his sword!
Job 40:20 For the mountains yield food for him where all the wild beasts play.
Job 40:21 Under the lotus plants he lies, in the shelter of the reeds and in the marsh.
Job 40:22 For his shade the lotus trees cover him; the willows of the brook surround him.
Job 40:23 Behold, if the river is turbulent he is not frightened; he is confident though Jordan rushes against his mouth.
Job 40:24 Can one take him by his eyes, or pierce his nose with a snare?
Leviathan (some have suggested a land-based animal like T-Rex, others a water dinosaur like Mosasaurus or Plesiosaurus)
Job 41:1 “Can you draw out Leviathan with a fishhook or press down his tongue with a cord?
Job 41:2 Can you put a rope in his nose or pierce his jaw with a hook?
Job 41:3 Will he make many pleas to you? Will he speak to you soft words?
Job 41:4 Will he make a covenant with you to take him for your servant forever?
Job 41:5 Will you play with him as with a bird, or will you put him on a leash for your girls?
Job 41:6 Will traders bargain over him? Will they divide him up among the merchants?
Job 41:7 Can you fill his skin with harpoons or his head with fishing spears?
Job 41:8 Lay your hands on him; remember the battle–you will not do it again!
Job 41:9 Behold, the hope of a man is false; he is laid low even at the sight of him.
Job 41:10 No one is so fierce that he dares to stir him up. Who then is he who can stand before me?
Job 41:11 Who has first given to me, that I should repay him? Whatever is under the whole heaven is mine.
Job 41:12 “I will not keep silence concerning his limbs, or his mighty strength, or his goodly frame.
Job 41:13 Who can strip off his outer garment? Who would come near him with a bridle?
Job 41:14 Who can open the doors of his face? Around his teeth is terror.
Job 41:15 His back is made of rows of shields, shut up closely as with a seal.
Job 41:16 One is so near to another that no air can come between them.
Job 41:17 They are joined one to another; they clasp each other and cannot be separated.
Job 41:18 His sneezings flash forth light, and his eyes are like the eyelids of the dawn.
Job 41:19 Out of his mouth go flaming torches; sparks of fire leap forth.
Job 41:20 Out of his nostrils comes forth smoke, as from a boiling pot and burning rushes.
Job 41:21 His breath kindles coals, and a flame comes forth from his mouth.
Job 41:22 In his neck abides strength, and terror dances before him.
Job 41:23 The folds of his flesh stick together, firmly cast on him and immovable.
Job 41:24 His heart is hard as a stone, hard as the lower millstone.
Job 41:25 When he raises himself up the mighty are afraid; at the crashing they are beside themselves.
Job 41:26 Though the sword reaches him, it does not avail, nor the spear, the dart, or the javelin.
Job 41:27 He counts iron as straw, and bronze as rotten wood.
Job 41:28 The arrow cannot make him flee; for him sling stones are turned to stubble.
Job 41:29 Clubs are counted as stubble; he laughs at the rattle of javelins.
Job 41:30 His underparts are like sharp potsherds; he spreads himself like a threshing sledge on the mire.
Job 41:31 He makes the deep boil like a pot; he makes the sea like a pot of ointment.
Job 41:32 Behind him he leaves a shining wake; one would think the deep to be white-haired.
Job 41:33 On earth there is not his like, a creature without fear.
Job 41:34 He sees everything that is high; he is king over all the sons of pride.”