OP – I forgot to say that God’s dominion of the sea monsters and dragons/serpents, and of chaos in general, is connected in Middle Eastern religious thought to command of the elements and especially of the sea.
The sea is basically equated with chaos in a lot of the ancient Middle East, because controlling water (through dams, irrigation canals, etc.) and escaping flooding is one of the things that is really big in Mesopotamia, and in Israel too. At the same time, Israel, Phoenicia, etc. are really big on shipping in the Mediterranean, but it’s also risky and not able to be controlled by humans. Israel also had lots of ocean earthquakes, and hence seashore tsunamis did happen.
Monsters (both real ones, like whales and sharks, and imaginary ones or ones inspired by fossils) are sort of like chaos and fear of chaos, symbolically, as well as being very close to the original Serpent in terrifyingness.
But in the pagan world, monsters like Tiamat were actually creators of the world, or the earth was made out of their slaughtered meat; whereas God made everything, including any monsters, and Job is very clear that monsters have to obey Him.
OTOH, the Gospel passage about walking on the sea actually quotes the Septuagint translation into Greek of Job 9:8: “peripaton… epi thalasses”. Mk. 6:48 has “peripaton epi tes thalasses” and Mt. 14:25-26 has “peripaton epi ten thalassan” and “epi tes thalasses peripatounta.”
(Peripaton is a Greek word for walk, like pacing or wandering or striding. Greek philosophers who taught their disciples while walking around were called “peripatetics.” So it’s got teaching connotations.)