Exploring the ocean and repairing underwater structures can be dangerous work. But scientists are designing robots that could do these jobs. One kind of robot looks like a snake. It would repair and inspect oil rigs. Its thin, flexible shape would allow it to go where divers cannot. Tiny submarines known as ecosubs could help scientists study and explore the ocean. One person could control a group of ecosubs. Each sub would have different sensors. The sensors would work together to collect information. Unmanned boats could help with data collecting, too.