Hawaiian bobtail squid owe their luminescence to bacteria they acquire from the environment. Genetic analysis clarifies how this symbiosis works.

"These fish are like candy. They are tiny, colorful bundles of energy that get eaten...by any coral reef organism that can bite, grab, or slurp them up."

New maps document the symbiotic relationships among trees, fungi, and bacteria in the world's forests.

New research shows how temperature can affect the symbiotic relationship between ants and trees on the African savanna.

There may have been many evolutionary paths in the development of organs that host useful bacteria.