“They’re very good at what they do, says the U.S. Navy’s Paul Armistead. Powerful even. They work fast, possess a tenacity that is remarkable, make it look easy, and they’ve been at it since the beginning of time. What’s more, they do it underwater. Billions of them glue themselves to ship hulls and cost the U.S. Navy over $50 million a year in fuel costs alone due to friction and drag. What’s worse is that each of the Navy’s ships is obliged to be cleaned in port yearly ? sometimes even more frequently. We’re talking the humble barnacle. Historically, everything from pitch to pesticides has been used to try to deter it, but nothing seems to repel completely this lowly, but determined crusty fouler. Now consider the sleek, smooth dolphin, which can spend its entire life in the water and never host a single barnacle, while a ship ? also designed with a smooth, sleek hull ? can develop a bad case of them in less than a month….