Category:Jellyfish

Jellyfish are gelatinous aquatic invertebrates and typically capable of injecting deadly toxins to immobilize their prey. The name can be applied to all free-swimming members of phylum Cnidaria. Many of them have a life cycle that alternates between the free-swimming jellyfish stage and the sessile polyp stage. However, some sessile forms such as those belonging to class Staurozoa are still generally regarded as jellyfish.