A young mexican hogfish in the center of this picture is cleaning inside the mouth of the pacific creole fish, as the other creole fish anxiously await their turn.

There were cleaning stations everywhere it seemed, areas where smaller fish would pick the parasites off larger animals.

We have seen this symbiotic give-and-take on many reef dives but in The Galapagos they seemed to be around each rock. And many larger fish were often found playing the "cleaner" role.

This photo was taken at Darwin's Arch near what the divemasters called The Theatre.