You probably already know that squids can eject ink that hides them from a threatening creature. These are like dense clouds that spread wide. But there’s a second form of inking that uses mucus to hold the ink blob together, in roughly to same size and shape as the departing squid. It’s called a pseudomorph (“false body”) in fancy science lingo.
When a predator approaches, the squid turns dark to match its ink color. Then it squirts out an inky decoy, rapidly turning itself to a brighter color while making its escape. The predator often chomps down on the pseudomorph, expecting it to taste like squid. Many other cephalopods do this as well, including most octopuses.
Watercolor, ink, paint pen, and white gel pen, 6″ x 6″.