I think you can universally say, that in the US states, and fishing in fresh water, you need a license. They are serious about it too. If caught fishing without a license, and the F&G officer decides to push the issue, they can take your gear, boat, and the car you hauled it to the water with… then fine you. But, a license is inexpensive. Follow all the rules, including catch (retained fish) limits, or the above can also apply. It doesn’t happen often, but if you were a repeat, or egregious offender, it can happen.
Salt water has traditionally been a free exercise, but a new National SaltWater Fishing registry was set up recently. The state has a choice of either having their own registry, which populates the National list; having fishermen register directly with the National list; or having a salt water license of their own. More info (geared around NH fishermen) can be found here. http://wildlife.state.nh.us/marine/Saltwater_Registry_FAQs.html There are links to more information there as well. There are a few exceptions, such as fishing from a “licensed for hire” vessel, and one for youth.
This year, NH residents can just register directly, but next year there will be a salt water license.
Though I’m not a salt water fisher… yet… I am a freshwater fisherman. I have no problem purchasing my fresh water license every year, but am irked by the idea of a salt water one. I’m not entirely sure why, other than “it was always free,” as my reasoning.
One other thing to keep in mind is that if you are an adult, and with a youth who does not require a license, and is fishing, you MAY NOT touch, handle, or use any fishing gear, nor assist with handling of fish, unless you are also in possession of a valid license. Again, the F&G officer probably won’t hassle you, but can, so the “I was just helping my kid” line isn’t particularly valid in their eyes.
F&G officers are generally strict, but fair, and don’t want to hassle someone making a mistake, but rather they want to stop those abusing the system. They want you out hunting & fishing, and enjoying the outdoors. Busting you won’t make a lifelong hobby participant… But, they could be having a bad day, and so I find it easier to just follow all the rules as they are written… even if it means not taking something I could otherwise legally do so.*
-Butler
*I have turkeys that come through my yard. With the appropriate instrument (bow & arrow in my case), and license in season, I should be able to legally harvest one of them. Only one conflict. One rule says “no discharge within 100yds of a dwelling,” another says that it’s fine, if you have landowner permission. I’m happy to give myself permission to fire on my land, but I’m not sure how it applies to my neighbor, though the rule that allows me to do it, specifically says that the neighbor doesn’t matter. Two F&G officers have given me two opinions. One says it’s fine, one says it isn’t. I’m leaning on the side of caution, and not taking them… though it kills me to see them walk off uncooked.