The water itself is supporting the jellyfish itself and assists in movement. You might notice that jellyfish fall flat and die when on land.
If your asking what they eat, its usually small/dead plants that are floating around.
bigger animals are the jellyfishes enemies.
No, they don't, neither they have any blood system at all.
jellyfishes eat plankton fish and even feed on other jellyfishes
No yes
35 people die by jellyfishes every year.
Yes, they are.
yes
sea
No. They are invertebrates.
yup
they sting worse than other jellyfishes also they are called box jellyfishes ?
# Pelagiidae, long jellyfishes like the common Pelagia noctiluca# Cyaneidae, the lion's mane jellyfishes# Ulmaridae, flat jellyfishes like the moon jelly# Tiburonidae, some aberrant abyssal forms