Abstract: A circulation water vortex bubble generation device is emerged in culture water of an aquaculture pond. The device includes a barrel having a central bore and front and rear open ends, a cover attached to the rear end of the barrel, and a nozzle mounted to the front end of the barrel. A water supply pipe is connected to the barrel in an off-center manner to supply water into the central bore. An air pipe is connected to the cover and in fluid communication with an air chamber defined inside the cover. An air guide tube in fluid communication with the air chamber extends from the cover through the central bore of the barrel. The nozzle forms a rearward-diverging conic water guide opening in a rear portion thereof, and in communication with the central bore. The nozzle also forms a water discharge opening in a front portion thereof and a water passage connecting between the water guide opening and the water discharge opening.