IIRC I have seen you post about your fishing/living off the SE Coast.
So you would know about ocean/bay dock rats.
‘So you would know about ocean/bay dock rats.”
I know there was one picked up in the bay by a local radio host. It was swimming in the middle of the bay (couple miles from shore) and she thought it was a dog. She took it to the vet for a checkup where she learned it was a rat. A BIG one.
Other than that I know they will chew thru the tile roofs, walls, and such. Don’t know how to stop them though.