Invention on Instagram: "Barnacles may look harmless, but they can cause major problems for ships. When they attach to the hull and propellers, they create drag that slows vessels down and forces engines to work harder. Even a thin layer of barnacles can increase fuel consumption by up to forty percent, costing shipping companies millions each year. To combat this, divers are sent underwater to carefully clean and scrape the hulls and propellers. It is a difficult and risky job that requires pre