Bondi Beach swarm

Date of Sighting: 02/27/2017
Description: Many types of Jelly fish and man o war covered the shoreline at Bondi Beach Feb 27 and 28. Looking for help on species types. Small Lions Mane Jelly fish? Some using a shell? Looking for some expert advice on what type they are.
Organism: Jellyfish
Quantity: 100+
NID Test