Scuba diver in a black wetsuit and yellow diving gear

$(best quality,ultra-detailed),(realistic:1.37) full body, male scuba diver with short black hair turning left in the open water wearing a diving mask and regulator in his mouth. He holds a knife in his right hand while his face is partially looking to the right. The surroundings are devoid of fish. The artwork is depicted with vivid colors to capture the realistic underwater atmosphere. The lighting effects bring out the fine details of the diver's equipment and the natural refractions of light in the water.$