Pelagia Noctiluna in French Riviera

I have seen about 3 Pelagia Noctiluna everyday for the past 3 days in varying sizes from a silver dollar pancake to a large cereal bowls. Got up this morning and saw 5 while I was swimming. They have all been alive, an orange to deep purple coloration, 4 large visible purple tentacles and Swimming anywhere from 20 to 80 feet offshore from Beaulieu Sur Mer, and in about 10 to 20 feet of water.