I believe that what people call reptilian is what the Bible refers to as devils and demons or demonic and devil possessed.
Genesis 3:1 Now the serpent was more subtle than any animal of the field which Yahweh God had made. He said to the woman, “Has God really said, ‘You shall not eat of any tree of the garden’?”
2 The woman said to the serpent, “We may eat fruit from the trees of the garden, 3 but not the fruit of the tree which is in the middle of the garden. God has said, ‘You shall not eat of it. You shall not touch it, lest you die.’”
4 The serpent said to the woman, “You won’t really die, 5 for God knows that in the day you eat it, your eyes will be opened, and you will be like God, knowing good and evil.”
Jesus connects them to demons.
Luke 10:17 The seventy returned with joy, saying, “Lord, even the demons are subject to us in your name!”
18 He said to them, “I saw Satan having fallen like lightning from heaven. 19 Behold, I give you authority to tread on serpents and scorpions, and over all the power of the enemy. Nothing will in any way hurt you. 20 Nevertheless, don’t rejoice in this, that the spirits are subject to you, but rejoice that your names are written in heaven.”
A dragon is a form of a reptile.
Revelation 12: 3 Another sign was seen in heaven. Behold, a great red dragon, having seven heads and ten horns, and on his heads seven crowns. 4 His tail drew one third of the stars of the sky, and threw them to the earth. The dragon stood before the woman who was about to give birth, so that when she gave birth he might devour her child. 5 She gave birth to a son, a male child, who is to rule all the nations with a rod of iron. Her child was caught up to God, and to his throne. 6 The woman fled into the wilderness, where she has a place prepared by God, that there they may nourish her one thousand two hundred sixty days.
7 There was war in the sky. Michael and his angels made war on the dragon. The dragon and his angels made war. 8 They didn’t prevail. No place was found for them any more in heaven. 9 The great dragon was thrown down, the old serpent, he who is called the devil and Satan, the deceiver of the whole world. He was thrown down to the earth, and his angels were thrown down with him.
Genetic modification is why there was the flood. Fallen angels were having sex with women. That is why Noah, who had not been genetically modified, was preserved on the ark.
The Bible says that as it was in the days of Noah…
Matthew 24:37 As the days of Noah were, so will the coming of the Son of Man be.38 For as in those days which were before the flood they were eating and drinking, marrying and giving in marriage, until the day that Noah entered into the ship,39 and they didn’t know until the flood came and took them all away, so will the coming of the Son of Man be.
Only this time there won’t be a flood.