More then a billion.
Jellyfish are single celled organisms.
50000000
water cells
Jellyfish are composed of cells just like any other organism is.
The stinging cells in a jellyfish are located in it's tentacles.
Jellyfish do not have collar cells. Sponges have collar cells, and yes, they are used for filter feeding.
"jellyfish"
Nucleus, mitrochrondia, and Golgi plus many more.
The box jellyfish survives with its venomous stinging cells
Yes.
One cell that a jellyfish has is nematocysts(stinging cells on tentacles).
Jellyfish are part of the Phylum Cnidaria, which includes animals with stinging cells. Within Cnidaria, jellyfish belong to the class Scyphozoa, encompassing the true jellyfish species. Further classification into orders, families, and species can vary based on the specific jellyfish being considered.