Blue Damselfish - Chromis chromis
Castagnole Blu – Chromis chromis – IntotheBlue.it
As always in the summers, looking at the holes in the mouths of the rocky shores of the Mediterranean, is very common to meet “Blue Damselfishes“. They are chromis chromis, Black Castagnola. The small specimens during this period have electric blue livery and are photophobes, often encountered in caves, crevices and other shaded environments.