God told Noah to go into the Ark with his family because he was found righteous by God.
God told him to take 7 pairs of the clean animals and the birds, to enusre they can flourish on the earth. But only two of the unclean.
Noah was 600 years oldwhen the flood waters came on the earth. Which means that his sons were 100 years old. (can you imagine a 100 year old now doing the kind of physical labor that is required to build a massive boat.)
It is very specific when the flood started. It was in Noah's 600 year, second month, and 17th day. The rain fell on the earth for 40 days and nights.
The Lord shut the door of the ark when Noah and his family and the animals were in safely.
vs 19 the water rose so that all the high mountains were covered. That is a lot of rain. I could not imagine that much water at one time all over the earth. The water covered the mountains 15 cubits deep. A cubit is about 18 inches so that is 25 feet of water. O My goodness. That is a lot of water.
It is listed that all the creatures died but the things that lived in the water nothing is mentioned of them. I would assume that after the flood some of them died because they would not be in the water but why weren't they even mentioned. The water stayed on the earth for 150 days. That is a long time to be in a boat on lots of water.