Do box jellyfish have prokaryote or eukaryote?

Box jellyfish have eukaryotic cells, which are more complex than prokaryotic cells. Prokaryotes are single-celled organisms that lack a nucleus and other membrane-bound organelles, while eukaryotes are more complex organisms that have a nucleus and other membrane-bound organelles. Box jellyfish are multicellular organisms, and their cells have a nucleus and other membrane-bound organelles, which makes them eukaryotes.