Modular boat

A modular boat can be adapted to meet various desired shapes and uses, and can be transportable. The modular boat can include multiple sections configured to be joined together by rod-connection(s), by interlock-connection(s), or both. Each section can be joined to other section(s) to form and use the modular boat, and can be separated from the other section(s) for transportation. Each section can extend from bow to stern and can be joined to the other section(s) at a junction extending from bow to stern. Each rod-connection can include a hole extending perpendicular to the junction, through the sections across the modular boat, and a rod extending through the hole. Each interlock-connection can include a a key inserted into a slot of an adjacent section at the junction.