It moves! Supposedly immobile barnacles can 'surf' across ...
· Barnacles are notoriously clingy creatures. The filterfeeding crustaceans—familiar sights on rocky shores or the hulls of boats—were long thought to be completely immobile. But a new study has confirmed that at least one species, which settles on top of sea turtle shells, can slide across surfaces to places where it's easier to snag a snack.