Don’t you find the metamorphosis of lobsters amazing? In your plate, a lobster sports a beautiful red-orange color. However, before moving on to the pan, the animal’s carapace was dark blue. Do you know why?
The orange pigment of its shell turns blue when it interacts with a protein.
The crustacyanin hard protons to the pigment, resulting in the color change. Credit: Shamima Begum / Physical Chemistry Chemical Physics.