When traveling, it is important to know the rules and regulations of the states you will be visiting. This is especially true for those who enjoy fishing. Many people are unaware that they may need a license from each state they plan to fish in. Luckily, there is some good news. In most cases, a license from one state will be valid in another. There are a few exceptions, such as when fishing in national parks or other federally managed areas. It is always best to check with the appropriate agency before heading out on your trip. There are also some differences between states when it comes to licensing fees and which species of fish can be caught. For example, while a Texas fishing license will allow you to catch all types of fish, a California license only allows for certain species.