Rhombofloaters can grow up to 50cm across, and have three air sacs at the centre of their body. They are composed of tens of thousands of smaller Rhombites, each without any appendages.
The rhombites produce six long filaments from the sides of the Rhombofloater.
Plankton stuck to the filaments is borken down and the nutrients transported to the Rhombofloater's centre.
Floaters reproduce by budding off a section of rhombites, with one filament and air sac. These are regenerated in the original.