Bede

And the Tyrians lived in it, bringing in fish, etc. Just as the good fish represents pious faith, which when one asks from the Lord, one does not receive the serpent of unbelief; similarly, the wicked fish represents base thoughts, which by their very nature tend to immerse themselves excessively in worldly cares; these the Tyrians, who are interpreted as the constrained, seek to sell to us on the Sabbath, when impure spirits improperly attempt to overwhelm the rest of our pious life with deep worldly concerns. …

Commentary on Ezra and Nehemiah ↗