Gouania willdenowi

About

The blunt-snouted clingfish is a species of clingfish found along the western Mediterranean Sea coasts from Spain to Italy. This species grows to a length of 5 centimetres (2.0 in) TL. The blunt-nosed clingfish is a little known species of shallow water along the littoral of the northern Mediterranean from Alicante to Sicily. Its range was formerly thought to extend to Israel and Syria in the east; however this was actually several closely related cryptic species. It can survive out of the water and occurs only among intertidal pebbles and sand.

Summary from Wikipedia