Dinosaurs are mentioned in the Bible.
In ancient Hebrew, The Behemouth means "Beast par eccelance"
and the Leviathan means a beast even far more powerful than the Behemoth.
Some versions say that Behemoth is referring to a Hippo, but a Hippo doe not have a tail that is like a cedar, and the Leviathan in some interpretations is said to be a Crocodile, but after reading the chapter, this is clearly not so.
Job 40:15 ΒΆ Behold now behemoth, which I made with thee; he eateth grass as an ox.
Job 40:16 Lo now, his strength [is] in his loins, and his force [is] in the navel of his belly.
Job 40:17 He moveth his tail like a cedar: the sinews of his stones are wrapped together.
Job 40:18 His bones [are as] strong pieces of brass; his bones [are] like bars of iron.
Job 40:19 He [is] the chief of the ways of God: he that made him can make his sword to approach [unto him].
Job 40:20 Surely the mountains bring him forth food, where all the beasts of the field play.
Job 40:21 He lieth under the shady trees, in the covert of the reed, and fens.
Job 40:22 The shady trees cover him [with] their shadow; the willows of the brook compass him about.
Job 40:23 Behold, he drinketh up a river, [and] hasteth not: he trusteth that he can draw up Jordan into his mouth.
Job 40:24 He taketh it with his eyes: [his] nose pierceth through snares.
Job 41:1 ΒΆ Canst thou draw out leviathan with an hook? or his tongue with a cord [which] thou lettest down?
Job 41:2 Canst thou put an hook into his nose? or bore his jaw through with a thorn?
Job 41:3 Will he make many supplications unto thee? will he speak soft [words] unto thee?
Job 41:4 Will he make a covenant with thee? wilt thou take him for a servant for ever?
Job 41:5 Wilt thou play with him as [with] a bird? or wilt thou bind him for thy maidens?
Job 41:6 Shall the companions make a banquet of him? shall they part him among the merchants?
Job 41:7 Canst thou fill his skin with barbed irons? or his head with fish spears?
Job 41:8 Lay thine hand upon him, remember the battle, do no more.
Job 41:9 Behold, the hope of him is in vain: shall not [one] be cast down even at the sight of him?
Job 41:10 None [is so] fierce that dare stir him up: who then is able to stand before me?
Isa 27:1 In that day the LORD with his sore and great and strong sword shall punish leviathan the piercing serpent, even leviathan that crooked serpent; and he shall slay the dragon that [is] in the sea.