So, if we review the verses Genesis 1:19 to 23 (below), your application of “Parallelism” would
lead to the following conclusions:
A. Fish swim in the sea / as do birds fly in the sky.
B. If fowl fly in the “open firmament” - - literally, “fly by the Face of the Firmament” - - or “the face of the clouds” (better than saying birds fly “in the clouds”, yes?) then
C. Fish must swim in the ocean. But that’s not what Verse 19/20 says: “Let the waters bring forth abundantly the moving creature that hath life…”
It would seem your parallelism is more imagined than real. Water must bring forth… while the sky is for flying, not for bringing forth.
Then God created great whales, which were brought forth by the waters…and maybe even the waters brought forth the birds too? - - except that there is the last part of verse 22: … and let fowl multiply in the earth.
That’s a pretty odd parallelism, yes? The fowl are multiplying in the Earth… not in the sky. If this was strict parallelism, you would think the fish would multiply on the ocean bed… not “in the water”. But water extends all the way down to the ocean bed, right? Well, so does the air, right? Clouds extend right to the ground as fog. Why would birds multiply in the Earth? Especially those that nest in the trees?
I think your parallelism is kind of casual … it’s approximate. It hardly seems to be so precise that you can determine that the firmament must mean clouds. What seems clear is that the firmament is part of the sky, not all of the sky itself. And that’s really all we can tell from this part of Genesis 1. In other parts of Genesis 1, we learn that the firmament divides the waters … it is not made of water.
Gen 1:19 - 20
And the evening and the morning were the fourth day. 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 [“open”, or “face of”, Paniym] firmament of heaven.
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. And God blessed them, saying, Be fruitful, and multiply, and fill the waters in the seas,
and let fowl multiply in the earth.
And the evening and the morning were the fifth day.