Jellyfish

Jellyfish are cnidarians whose bodies are largely water and lack the bones and organs familiar in vertebrates. A pulsing bell provides movement, while currents strongly influence their travel. Tentacles or oral structures capture food using stinging cells. Species differ greatly in size, habitat and life cycle. Comb jellies may resemble jellyfish but belong to another animal group, and not every jellyfish has the same tentacle arrangement or effect on people.