Jellyfish Nutrition Facts
Jellyfish are free-swimming sea organisms with tentacles and bodies made of gelatin in the shape of an umbrella. They lack an advanced brain, lungs, or intestines and have a basic physical structure. They do have a well-organized tissue system, though. Jellyfish are planktonic organisms, not fish. Fish are typically vertebrates that breathe through gills and live in water.
On the other hand, Jellyfish are invertebrate animals without a backbone that breathe through membranes. The earliest known multicellular organism is a jellyfish. They’ve been around for more than 500 million years.