The shapes seen in the image are about the size of a thumbnail. They are created by mixing ferrofluid with water color and putting it into a magnetic field. When put under a magnetic field iron particles in the ferrofluid solution start to rearrange, forming the black channels and separating the water colors from the ferrofluid.
If you’re about to get eaten by something, your first reaction is to try and get a bigger something to eat the something that wants to eat you, right? No? It wasn’t mine either, but for this awesome jellyfish that is exactly what it does when disturbed. The biolumnescent alarm jellyfish puts on a fascinating light show when disturbed, in an attempt to attract the attention of a larger fish to eat its predator.
You can see a view of the alarm bioluminescence here.