China's ROV collects rare deep-water sea slugs in western Pacific Ocean

Photo taken on May 27, 2019 shows two rare deep-water sea slugs collected by China's remote operated vehicle (ROV), Discovery, in western Pacific Ocean. Discovery, a remote operated vehicle (ROV) aboard China's research vessel KEXUE (Science), captured two rare deep-water sea slugs in western Pacific Ocean in a recent dive. (Xinhua/Zhang Xudong)