Mediterranean parrotfish (Sparisoma cretense), a fairly common fish in Greek waters, and probably the only larger fish often eaten with its guts intact.
It's usually just fried, but on Symi they dried it (and its intestines, separately) and eat the latter as a meze. Depicted in the art of the Bronze Age Minoans, it was always a big favourite of the ancient Greeks.
Image by Dunk 🐝