What group is the jellyfish?

Within Cnidaria, they are further classified into the class Scyphozoa.

Here's a breakdown of the classification:

* Kingdom: Animalia (animals)

* Phylum: Cnidaria (cnidarians)

* Class: Scyphozoa (true jellyfish)

While other cnidarians, like corals and sea anemones, are closely related to jellyfish, only those in the class Scyphozoa are considered "true jellyfish."