👉 Jellyfish are aquatic animals that belong to the phylum Chondrichthyes, characterized by their translucent, transparent skin and soft, round bodies. They have a hard, tough outer layer of exoskeleton made up primarily of calcium carbonate, which they use for protection and buoyancy in water. Jellyfish can be found in many different species worldwide, from tropical to temperate seas. Their primary role is in photosynthesis, where they convert sunlight into energy through the process known as photos