i wade fish the bays here in texas. you have to have real long, as in 15-20' of stringer an make sure not to let the fish swim close to ya. sharks have yanked me back two or three steps many times when they take the fish.
i was guttin an gilling some fish at the boat one day when i looked around-the tide was coming in-- and there just out of reach of my 7'6" rod was 5' blacktip-he was just treading water into the tide waiting for me to throw him somemore guts. he stayed there as i fed him and then moved on.
i will tell you something that will scare you--wadin the surf at night. here on the coast there are a series of bar-with guts between them-and we generally fish the third bar in the day. you wade out from shore, about knee deep to the first bar, then you have to cross a chest deep gut to the second bar--the third bar requires eithe swimming or tppy-toein to get to--then ya fish past the third bar. you are generally in waist deep water on both the second and third bars. you can catch some really nice fish there if you can catch the green water in close.
i digress---you do not fish the third bar at night. several times, on real clear nights when there is a good moon i have seen 6 and 7' shadows just glide by while fishing. oh by the way, a 25' stringer can seem real short about that time.
blessings