BITING or PINCHED ?
Comber (Serranus cabrilla), Medes Islands, L'Estartit, Spain
The comber seems to be feeding of a crab but after observing the scene for a while, I noticed that in fact, the small crab was pinching the fish's lip.
Olympus OMD EM5 MkII, Zuiko 60mm Macro lens, Nauticam Housing, Dual Inon Z-240 Strobes. Settings 1/125, f/18, ISO100