Crab is one of the sea's most delicious offerings, and making it in your own kitchen can be as easy as opening a can, or as challenging as cracking the whole crustacean open with an actual mallet.

Gall crabs are tiny and yet these crustaceans have evolved fluorescence to help them be concealed within hideouts they have created in the coral itself [1]. “These crabs are everywhere,” says Susanne ...