There is a questionare on the site that Bucktail directed you to in the above post.
One of the questions is: Will you be fishing for anadromous species in tidal water, or do you think that there is a chance you will catch anadromous* fish?
(*Anadromous fish are species that live part of their lives in fresh water and part of their lives in salt water. They include river herring, salmon, shad, smelt, sturgeon or striped bass)
If you answer yes to this question you do need to register.
You will be fishing tidal waters, therefore, you will need to register.