Wow... I don't ever really see too many jellyfish up here near Sydney, very rarely have I seen these really big red ones... and I mean BIG, they must weigh around 10 kilos and some of the bigger ones look to be the size of a car wheel :|.
I remember I used to come across a few when I used to do rowing, we used to try scoop them into the opposing boat with our oars muahahaha!

We only get craploads of bluebottles... what do they eat? small fish? Because I rekn their sole purpose is to annoy mankind. I'm so used to their stings by now they are more a nuisance than anything else... although I heard some kiddy at Avalon or Newport swallowed one by mistake... makes me kindof hungry