Take a photo of a friendly little crustacean (ok some might not be friendly!). A crustacean is an invertebrate animal with several pairs of jointed legs, a hard protective outer shell, two pairs of antennae, and eyes at the ends of stalks. Lobsters, crabs, shrimps, and crayfish are examples of crustaceans.
The subject of your shot can be of any crustacean, or representation of a crustacean. It can also include people.