I couldn't resist painting these luminous white spotted jellyfish (Phyllorhiza punctata). Also known as the floating bell or the Australian spotted jellyfish, they grow to about 18-20 in. in bell diameter. Those I saw were only about a third of this size, though, and swirled around their tank like tiny ruffled balls of light.
This 11x14 in. watercolor comes matted in arctic white to fit a 16x20 in. frame (frame not included).