Blip Blop

Backblipping my week in Italy, 4th - 9th if anyone's interested :)

We went on a long rambling walk around the outskirts of Sorrento, through steep winding paths, olive and lemon groves either side. Eventually, we found a secret spot by the sea, seemingly known only to Italian holidayers. It's a gorgeous, rocky cove just perfect for sunbathing and snorkelling. Just sun, sea and kids and their dads dive-bombing from the rocks. We loved it so much that we spent three days there, and I took tons of photos of the wildlife.

Can anybody tell me what this is? I saw a few of them hiding in dark spots between the rocks. Very weird.