Sons of God = Angels or a being above man.
Morning stars = Angels
Watchers = Angels
Giants = The abominable hybrid fusion of humans and the sons of God.
Dinosaur: This new term was created in the 19th Century. The bible predates that word. In archaic terms, those abominations were only described, not given a name.
King James Version Bible
Daniel Chapter 4
13. I saw in the visions of my head upon my bed, and, behold, a watcher and an holy one came down from heaven;
Job Chapter 1
6. Now there was a day when the sons of God came to present themselves before the LORD, and Satan came also among them.
Job Chapter 38
7. When the morning stars sang together, and all the sons of God shouted for joy?
Luke Chapter 8
28. When he saw Jesus, he cried out, and fell down before him, and with a loud voice said, What have I to do with thee, Jesus, [thou] son of God most high? I beseech thee, torment me not.
Daniel Chapter 3
25. He answered and said, Lo, I see four men loose, walking in the midst of the fire, and they have no hurt; and the form of the fourth is like the son of God.
1 John Chapter 3
2. Beloved, now are we the sons of God, and it doth not yet appear what we shall be: but we know that, when he shall appear, we shall be like him; for we shall see him as he is.
Genesis Chapter 6
1. And it came to pass, when men began to multiply on the face of the earth, and daughters were born unto them,
2. That the sons of God saw the daughters of men that they [were] fair; and they took them wives of all which they chose.
4. There were giants in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bare [children] to them, the same [became] mighty men which [were] of old, men of renown.
11. The earth also was corrupt before God, and the earth was filled with violence.
12. And God looked upon the earth, and, behold, it was corrupt; for all flesh had corrupted his way upon the earth.
17. And, behold, I, even I, do bring a flood of waters upon the earth, to destroy all flesh, wherein [is] the breath of life, from under heaven; [and] every thing that [is] in the earth shall die.
Romans Chapter 3
10. As it is written, There is none righteous, no, not one:
Genesis Chapter 6
9. These [are] the generations of Noah: Noah was a just man [and] perfect in his generations, [and] Noah walked with God.
[How can Noah & his direct line be perfect after reading that verse? Noah and his direct line did not have sex with sons of God, nor their hybrids, nor were they fusion of the two different beings.]
[In summary, its possible that hybrids caused in imbalance in the food chain. Mostly likely the fallen angels augmented the natural animals we have today to sustain the giants.
[This could be a main reason why God hates witchcraft. For more details you would have to read the Books of Enoch, Jasher, and Jubilees. Its not necessary to enquire about salvation but it could answer a lot of questions about dinosaurs.]
The Book of Enoch: Chapter 7
1. It happened after the sons of men had multiplied in those days, that daughters were born to them, elegant and beautiful.
2. And when the angels, the sons of heaven, beheld them, they became enamoured of them, saying to each other, Come, let us select for ourselves wives from the progeny of men, and let us beget children.
10. Then they took wives, each choosing for himself; whom they began to approach, and with whom they cohabited; teaching them sorcery, incantations, and the dividing of roots and trees.
11. And the women conceiving brought forth giants,
12. Whose stature was each three hundred cubits. These devoured all which the labor of men produced; until it became impossible to feed them;
13. When they turned themselves against men, in order to devour them;
14. And began to injure birds, beasts, reptiles, and fishes, to eat their flesh one after another, and to drink their blood.
[began to injure = possible transformation]
The Book of Enoch: Chapter 8
9. And men, being destroyed, cried out; and their voice reached to heaven.
Book of Jasher Chapter 4
18. And their judges and rulers went to the daughters of men and took their wives by force from their husbands according to their choice, and the sons of men in those days took from the cattle of the earth, the beasts of the field and the fowls of the air, and taught the mixture of animals of one species with the other, in order therewith to provoke the Lord; and God saw the whole earth and it was corrupt, for all flesh had corrupted its ways upon earth, all men and all animals.
[corrupted its ways = possible transformation]
21. And Noah found grace in the sight of the Lord, and the Lord chose him and his children to raise up seed from them upon the face of the whole earth.
Book Jubilees Chapter 5
2. And lawlessness increased on the earth and all flesh corrupted its way, alike men and cattle and beasts and birds and everything that walks on the earth -all of them corrupted their ways and their orders, and they began to devour each other, and lawlessness increased on the earth and every imagination of the thoughts of all men (was) thus evil continually.
[corrupted their ways and their orders = possible transformation]
5. But Noah found grace before the eyes of the Lord.
The Book of Enoch: Chapter 10
1. Then the Most High, the Great and Holy One spoke,
11. All the sons of men shall not perish in consequence of every secret, by which the Watchers have destroyed, and which they have taught, their offspring.
12. All the earth has been CORRUPTED BY the effects of the TEACHINGS of Azazyel. To him therefore ascribe the whole crime.