Hi, Jackson! Nice to meet you! Welcome to CF!
Genesis 1:20 And God said, Let the waters bring forth abundantly the moving creature that hath life, and fowl that may fly above the earth in the open firmament of heaven.
21 And God created great whales, and every living creature that moveth, which the waters brought forth abundantly, after their kind, and every winged fowl after his kind: and God saw that it was good.
22 And God blessed them, saying, Be fruitful, and multiply, and fill the waters in the seas, and let fowl multiply in the earth.
Unless it is a hybrid or something, the Greenland Shark was no exception to God's blessing.
And
if that blessing came in the form of fecundity, then 38 generations would be no problem to explain.
Note here, where God did this very thing with the Hebrews in Egypt:
Exodus 1:19 And the midwives said unto Pharaoh, Because the Hebrew women are not as the Egyptian women; for they are lively, and are delivered ere the midwives come in unto them.
Exodus 1:20 Therefore God dealt well with the midwives: and the people multiplied, and waxed very mighty.
QV my challenge thread on this subject:
My Genesis 1 Bottleneck Event Challenge