Sometimes, post titles just write themselves.
Ed Yong wrote an excellent article over at the Atlantic about boxer crabs, and how they do just that. They hold sea anemones (one in each claw) to facilitate eating. If you get rid of the anemones, the crabs can’t feed themselves.
However, when the anemones are freed from the crabs grasp, they flourish! Turns out, the crabs are trimming the anemones so they are a manageable size to carry around. And they do this, by cutting it in half.
Intrigued? Read about it here.