Lacassine 6-17 No bass but...

[silvercarp]

Title 56 is very big. I don't expect the game warden to know every little law in the book. I would print out a copy of the law and show it to the next one that tells you that. After you show him your saltwater license. Then ask him why he said you needed one.
Of course, common sense says that if you are fishing in a saltwater area, there is a chance you might catch a saltwater fish and you are going to want to keep it. You would probably be better off having the saltwater license anyway just in case. It would be a shame to have to throw back a good red or flounder because you only have a freshwater license.
After all, it's only a few dollars for 365 days of fishing.