Yes, they are.
bigger animals are the jellyfishes enemies.
jellyfishes eat plankton fish and even feed on other jellyfishes
No yes
35 people die by jellyfishes every year.
sea
yes
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
Jellyfishes are not electrical.
No, they haven't.