There are very few people who go fishing on a consistent basis and do not wear sunglasses. It just does not make a lot of sense, because it can be a very frustrating experience to have to stare into the sun on a consistent basis. With that being said, there are certain sunglasses that are going to be better for fishing than others.
When searching for the best fishing floating sunglasses, look for a pair that is extremely comfortable. A person is going to be wearing these throughout the day, so it makes no sense to get a pair of sunglasses that do not really feel that comfortable after wearing them for just a few minutes.
Another thing to consider is to get something that is very lightweight. Nobody wants to have something that is heavy on their face every single day for hours at a time.