Rhodaliidae is a family of siphonophores.

In Japanese they are called ヒノマルクラゲ (hinomarukurage).

[5] Rhodaliids have a characteristic gas-secreting structure called aurophore.

[2] Below the enlarged pneumatophore (float), the siphosome and nectosome are contracted into a complex.

[2] Rhodaliids have a benthic lifestyle and use their tentacles to attach themselves to the seafloor.