Franco Banfi / Nudibranch (Cratena peregrina) on a sponge, Ist Island, Croatia, Adriatic Sea, Mediterranean.

Franco Banfi / Nudibranch (Cratena peregrina) Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Solvin Zankl / Nudibranch (Cratena peregrina) San Pietro Island, Sardinia, Italy, Mediterranean, July

Wild Wonders of Europe / Pitkin / Nudibranch / Sea slug (Cratena peregrina) feeding on hydroids, 'Turtle Rock', Passage du Cavallo, Lavezzi Archipelago, Corsica, France, September 2008

Franco Banfi / Pilgrim hervia nudibranch (Cratena peregrina) close up, Marine Protected area Punta Campanella, Costa Amalfitana, Italy, Tyrrhenian Sea.

Alex Mustard / Nudibranch (Cratena peregrina) laying a ribbon of eggs, Tavolara Island, Sardinia, Mediterranean Sea.