What is a Jellyfish?
Jellyfish are an invertebrate species of sea dwelling animal that are so named due to their gooey gelatin-like bodies. Jellyfish are not fish. They belong to the Cnidaria phylum, which includes other simple-bodied marine invertebrates such as sea anemones and corals. The jellyfish is considered simple-bodied because, like its Cnidarian cousins, it has no head, brain, heart, eyes, or ears. Thus the jellyfish is also lacking in the sensory systems that correspond to these organs.
