QYSEA (also known as Shenzhen QYSEA Tech, 深圳鳍源科技有限公司) is a company developing Fifish, an unmanned underwater vehicle (UUV) brand. It provides consumer, professional, and enterprise underwater drones and remotely operated vehicles as well as cameras, robotic arms, compass rulers, underwater GPS, onshore power supply systems, etc. The company caters to aquaculture, offshore energy, search and recovery, maritime, infrastructure, and other industries.