One clue as to the totality of the flood in scripture, all land life that breathes air was killed across the face of the whole earth.
But not sea life. This flood was only for dry land dwellers
Genesis 6
17 And I, behold, I will bring a flood of waters upon the earth to destroy all flesh, wherein is the breath of life under heaven: all that is in the earth shall perish.
Genesis 7
19 The waters [
j]prevailed so exceedingly upon the earth, that all the high mountains, that are under the whole heaven, were covered.
20 Fifteen cubits upward did the waters prevail, when the mountains were covered.
21 Then
all flesh perished that moved upon the earth, both fowl and cattle and beast, and everything that creepeth and moveth upon the earth, and every man.
22 Everything in whose nostrils the spirit of life did breathe, whatsoever they were in the dry land, they died.
23 So [
k]he destroyed everything that was upon the earth, from man to beast, to the creeping thing, and to the fowl of the heaven: they were even destroyed from the earth. And Noah only [
l]remained, and they that were with him in the Ark.
24 And the waters prevailed upon the earth an hundred and fifty days.