A laminar jet for a hydrotherapy tub having a water inlet adapted for attachment to a water circulation system, a flow inducer section and a cap having a water outlet at one end of the cap. The cap may be rotated so the jet directs a substantially laminar water stream from the water outlet substantially parallel to tub surface. The jet cap may be locked in a desired position. A bathtub may have a number of laminar jets which may be direct water streams toward convergent zones and may simulate natural laminar flows. The zones or streams may be associated with recesses, channels or protrusions on a tub wall or directed to or around an object or occupant in the tub. The jet may be optimized for laminar flow by CFD, including streamline adjusting, eliminating negative pressure drop, and maximizing volumetric flow.