Gone fishin': decorator crabs use other species as fishing rods, study reveals

A researcher’s diving holiday lead to a startling discovery of never-before-seen behaviour: crabs using hydrozoans as fishing hooksEvery night as the sun goes down, on the coral reefs of the Red Sea small, delicate and slightly fuzzy-looking crabs work their way through the maze of coral. They take up stations atop the corals’ outermost structures, exposing themselves to the current in the plankton-rich waters. These are decorator crabs, of the genus Achaeus, known for their peculiar