The SeaOrbiter, also known as Sea Orbiter (two words), is a proposed oceangoing research vessel based on the ideas of French architect and oceanographer Jacques Rougerie.

The SeaOrbiter is planned to allow scientists and others a residential yet mobile research station positioned under the oceans' surface, with laboratories, workshops, living quarters and a pressurized deck to support divers and submarines.

[2] SeaOrbiter is a project of the "Floating oceanographic laboratory" organisation.

[3] As proposed, the laboratory would be a semi-submersible oceangoing craft weighing 1,000 tonnes (2,200,000 lb).

It is designed to float vertically and drift with the ocean currents but has two small propellers allowing it to modify its trajectory and maneuver in confined waters.