The whole event the Exodus is a parable. .using the things seen the temporal to signify the things not seen the eternal, supernatural.
That law of interpretation that informs us without parables the Holy Spirit of Christ spoke not is not limited to the new testament.
Dry land called good as God approval is one of the metaphors.
The supernatural what I will call a parable converter must be applied .
2 Corinthians 4:18 While we look not at the things which are seen, but at the things which are not seen: for the things which are seen are temporal; but the things which are not seen are eternal.