What type of engine on boats is common on boats designed or shallow water?

Boats designed for shallow water commonly use outboard engines, which are mounted on the transom and can be easily raised or tilted to navigate through shallow areas. These engines allow for greater maneuverability and can be powered by either gasoline or electric motors. Additionally, jet drive systems are also popular for shallow-water boats, as they draw water in and expel it out, reducing the risk of damage from submerged obstacles.