“But I guess considering some sort of giant flood is ridiculous.”
Bang on! The flood of Noah’s day explains a lot of the unusual undersea discoveries. Most will scoff at giving a bible account any credibility.
13 By the first day of the first month of Noah's six hundred and first year, the water had dried up from the earth. Noah then removed the covering from the ark and saw that the surface of the ground was dry.
14 By the twenty-seventh day of the second month the earth was completely dry.
OTOH, science has clearly documented from hundreds of sources, and consistant with thousands of field observations, that the sea level rose 300ft when the glaciers melted at the end of the last ice age.