GSDs and Jellyfish?

I'm not sure whether this is a health question, per se, so moderators please feel free to move this into a more appropriate section.

I was wondering whether anyone has any experience with GSDs encountering jellyfish when at the beach / swimming?

We have a beach very near us that is gorgeous and allows swimming for both people and dogs, as long as the dogs are leashed in some way. Great for exercise. Except that this beach is known for jellyfish late in the summer. Is there any specific danger or issues in regards to jellyfish I should be aware of, other than the obvious (me getting stung on my nekked legs)? Do they affect dogs the same as they do people? Should I look for a different place to swim?