Abstract: Apparatus, system, and method for separating gas from a composite fluid. The apparatus includes a main body defining a flow path formed from a separations chamber at an upstream end of the flow path and a head space chamber at the downstream end of the flow path. The main body includes a first set of apertures disposed about the separations chamber and a second set of apertures disposed about the head space chamber. An agitator is housed within the main body at an upstream end of the separations chamber and is configured to generate a vortex that conveys the composite fluid through the flow path. The vortex expels a liquid fraction and a solids fraction of the composite fluid from the first set of apertures, and the vortex conveys a gaseous fraction of the composite fluid into the head space chamber for extraction from the second set of apertures.