Black-Face Blenny, male (Tripterygion delaisi), Ajaccio, Corse, France
This blenny specie presents a strong sexual dimorphism. Male individuals are yellow with a black face during reproduction period. Otherwise, male and female individuals are grey, brownish, or red.
Olympus OMD EM5 MkII, 60mm Macro Lens, Nauticam Housing, Dual Inon Z-240 Strobes. Settings 1/125, f/16, ISO200