Scyphozoa are sometimes called true jellyfish, though they are no more truly jellyfish than the others listed here. They have tetra-radial symmetry. Most have tentacles around the outer margin of the bowl-shaped bell, and long, oral arms around the mouth in the center of the subumbrella.

Where are jellyfish stingers located?

Located on their tentacles, jellyfish's stinging cells are called cnidocytes. They are small compartments that house a mini needle-like stinger.

What are jellyfish tentacles for?

The tentacles, with their stinging cells, serve as defense and as a powerful weapon for capturing prey.