I'm chasing a Diplodus seabream.
It continuosly turns away from my camera and because of being wide, but flat appears only as a narrow stripe in a dim colour of a background, loosing all the glitter of it's scales.
That's why sneaking slowly is necessary and shooting is possible when fishy turns or changes direction.
There seems to be Symphodus (Crenilabrus) doderleini wrasse in the background.
Somehow, it's damn hard to identify fishes by an index or an encyclopaedia. Creature that glances and plays colours is very far away from a static drawing of bright and clear colours, with a tail and fins spreaded wide. Fortunately, there is an awesome FishBase
portal on the net.