Some Istrian tracks and fossils

This is a piece of a Cretaceous rudist reef I have found on the dry wall somewhere near Banjole in southern Istria. There were even larger pieces of these extinct mollusks. Some big ones reminded me of the elephant tusks. They were to big for me to take them with me.

 In the photograph below is another strange track from one of Pula's beaches. I am not what is it exactly. Was it a small theropod track or a sea bird footprint? It even seems to have been left by a webbed foot.

Observe the possible resemblance with the recent sea gull tracks in the cement.