A false killer whale is seen in waters in northern area of the South China Sea, July 18, 2020. It's the first time that false killer whales, a Class-II protected species in China, have been spotted and recorded in the area by Chinese researchers. (Xinhua/Zhang Liyun)

False killer whales are seen in waters in northern area of the South China Sea, July 18, 2020. It's the first time that false killer whales, a Class-II protected species in China, have been spotted and recorded in the area by Chinese researchers. (Xinhua/Zhang Liyun)

A false killer whale is seen in waters in northern area of the South China Sea, July 18, 2020. It's the first time that false killer whales, a Class-II protected species in China, have been spotted and recorded in the area by Chinese researchers. (Xinhua/Zhang Liyun)

False killer whales are seen in waters in northern area of the South China Sea, July 18, 2020. It's the first time that false killer whales, a Class-II protected species in China, have been spotted and recorded in the area by Chinese researchers. (Xinhua/Zhang Liyun)

False killer whales are seen in waters in northern area of the South China Sea, July 18, 2020. It's the first time that false killer whales, a Class-II protected species in China, have been spotted and recorded in the area by Chinese researchers. (Xinhua/Zhang Liyun)