Sometimes, a dock isn't just a dock. It's a habitat, a living thing. In the tiny fishing community of Panacea, Florida, the author's floating dock nurtures an abundance of marine life. Crabs, worms, mollusks and algae make their home there, attracting and feeding fish and other creatures higher up the food chain. These also feed the author's business, Gulf Specimen Marine Lab, which supplies specimens to research and teaching institutions: marine...