Silas, Nah. I used to spend entire days swimming among lightly stinging jellyfish on the New Jersey shore. Their sting was more itchy than painful. I'd swim until I got too itchy, then get out for a minute to rub dry sand on it, which took the sting away immediately, then go right back in the water. I actually loved it, because most people were too scared or grossed out to go in the water, so I had almost the whole beach to myself - with my own private life guards.