True Jellyfish (Scyphozoa)

Nomura's jellyfish (エチゼンクラゲ, echizen kurage; Nemopilema nomurai) is a very large rhizostome jellyfish, in the same size class as the lion's mane jellyfish, the largest cnidarian in the world.

The cannonball jellyfish (Stomolophus meleagris), also known as the cabbagehead jellyfish, is a species of jellyfish in the family Stomolophidae.

Rhizostoma pulmo, commonly known as the barrel jellyfish, the dustbin-lid jellyfish or the frilly-mouthed jellyfish, is a scyphomedusa in the family Rhizostomatidae.

The lion's mane jellyfish (Cyanea capillata) is one of the largest known species of jellyfish.

The spotted jelly (Mastigias papua), lagoon jelly, golden medusa, or Papuan jellyfish, is a species of jellyfish from the Indo-Pacific oceans.

Chrysaora fuscescens, the Pacific sea nettle or West Coast sea nettle, is a widespread jellyfish that lives in the northeastern Pacific Ocean, in temperate to cooler waters off of British Columbia and the West Coast of the United States, ranging south to Mexico.

Cassiopea (upside-down jellyfish) is a genus of true jellyfish in the family Cassiopeidae.

Chrysaora hysoscella, the compass jellyfish, is a common species of jellyfish that inhabits coastal waters in temperate regions of the northeastern Atlantic Ocean, including the North Sea and Mediterranean Sea.