A gross Epinephelus marginatus grouper flitted under a rock resembling the Colosseum, when has seen me. Under one of Coliseum's arch a Scorpaena notata lied looking steadily at me, and fugitive grouper mockingly waved it's fins from behind.
Later, at the upper part of the picture, above the scorpion fish, the mysterious "bells" have been noticed. European-Marine-Life.org
experts team identified them as probably mollusc egg capsules.