Balanus balanus found at depths of up to and grows on bedrock, boulders, pebbles and shells. It seems to favour habitats with strong currents and when overcrowding occurs, adopts different shapes to fit the space available. It is often found growing alongside another barnacle, "Balanus crenatus". Other species often found in its vicinity include "Tubularia larynx", "Obelia geniculata", "Pomatoceros triqueter", "Pecten maximus", "Hydroides norvegica", "Chlamys opercularis" and "Sertularia" species. Coralline algae was often present as were the whelk, the European edible sea urchin ("Echinus esculentus"), the great spider crab ("Hyas araneus") and the shore crab ("Carcinus maenas"). The main predator is the
Lucius Caecilius Metellus Diadematus went to arrest him. He lived to see the return of his first cousin, Quintus Caecilius Metellus Numidicus, from exile, and exerted himself to obtain his recall. Lucius Caecilius Metellus Diadematus Lucius Caecilius Metellus Diadematus was the second son of Roman politician and general Quintus Caecilius Metellus Macedonicus. During his consulship in 117 BC he supported the development of roads in Italy and he probably built "Via Caecilia". A year later he was Proconsul of Cisalpine Gaul. In 115 BC Diadematus was elected Censor and during his censorship with Gnaeus Domitius Ahenobarbus they expelled 32 Senators from the Senate. He