It was currently nighttime. But even if it was daytime, it wouldn't have mattered for Cultivator, who had gone beyond a depth of 10 meters from the ocean surface. At present, relying on just Underwater Breathing, he proceeded underwater.
Soon after, he activated another passive ability that allowed him to head deeper into the ocean depths. Once he noticed any dangerous fishes approach him through one of his abilities, he activated another passive ability, causing them to ignore him, as if they could sense that he would taste disgusting.
This way, he avoided all battles, continuing to head deeper and deeper into the ocean. He didn't seem bothered about Gehen obtaining an active ability, minding his own business. He seemed pretty excited about the exploration, gazing at the various fishes that swam past.