Not sure about the giants, but the shrimp in Genesis was Phil Collins.

They were Nephilim. “The Nephilim proved to be in the earth in those days, and also after that, when the sons of the true God continued to have relations with the daughters of men and they bore sons to them, they were the mighty ones [Heb., hag·gib·bo·rim′] who were of old, the men of fame.”—Ge 6:1-4.

If there were really giants, they very carefully left no evidence of their existence!

The Bible tells us in Genesis that "the sons of the true god saw the daughters of men and desired them, so they took on human form and came to the earth". Well, babies were born to these angels and their wives. But the babies were different. They kept growing bigger until they became giants, yes, wicked giants. The Bible calls them “mighty ones who were of old, the men of fame.” These giants tried to force everyone to be bad as they were. As a result, the Bible says that “the badness of man was abundant in the earth and every inclination of the thoughts of his heart was only bad all the time.” (Genesis 6:4, 5) So Jehovah brought the Flood. The giants, or “Nephilim,” and all the wicked people were drowned. But what happened to the angels that had come to earth? They did not drown. They put aside their fleshly bodies and returned to heaven as spirit persons. But they were not allowed to become part of God’s organization of holy angels again. Instead, the Bible says that “God did not hold back from punishing the angels that sinned, but, by throwing them into Tartarus, delivered them to pits of dense darkness to be reserved for judgment.”—2 Peter 2:4.

I concur Inquisitve. could not have done better.