No. They are invertebrates.
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.
they sting worse than other jellyfishes also they are called box jellyfishes ?
Yes, they are.
sea
yes
yup
# 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.