Yes, and they vary by company.

Probably. Most commercial boat tours have minimum age or height requirements, but there’s no single rule. It depends on the tour type, vessel size, and local safety regulations.

The reasons are usually practical: life jackets have to fit properly, small children can’t grip rails in rough water, and some boats aren’t set up for infants. A fast RIB (rigid inflatable) ride on the ocean might require kids to be 4 feet tall. A slow sightseeing boat on a calm river might let you bring an infant in a carrier. But you have to check each operator’s fine print — tour aggregators often hide these details.

Don’t book until you confirm directly with the company.