What’s That? (62)
Puzzle Series: What is this, or what do you want it to be?
Valentine's Day gift? Alien head? I think this one should go quickly....
Update: Answer: This is a picture of two frolicking comb jellies at the Monterey Bay Aquarium.
The rainbows ripple down eight ridges, each of which is a comb of tiny hairs used for propulsion through the water. The intense colors are caused by diffraction since the structures repeat with a period precisely related to the wavelength of light (just like in a diffraction grating... which also makes the rainbow of colors appear on a music CD).