Sun protection and fishing have special concerns. For one thing, wind can be a concern so a chin strap sun hat is important. Secondly, you don't want to get sunscreen on the line because it can scare the fish. Wearing sun protective clothing means you don't need sunscreen on your body, and SunGloves are a great way to not need sunscreen on your hands.
Boating and fishing is typically an all-day affair and that means maximum sun protection. Even the highest SPF sunscreen is not up to the job. Full body sun protective clothing is needed, and since it is often hot, you will see summer weight fabric and venting to keep you comfortable below.
Reflection is also a concern when boating or fishing, and that's where a good sunscreen comes into play for the face. (Stream fishing tip: "Wash" your hands with the surrounding dirt so you have the local scent on your hands when you touch the line)