Sea Dragon-class remotely operated underwater vehicles (ROUVs) are a class of Chinese remotely operated vehicle (ROV) used to perform various underwater tasks such as oil platform service, salvage, and rescue missions. Following the successful development of the original Sea Dragon (海龙), a series of ROUVs based on it have been developed. The original model had a diving capability up to 3,500 meters, but subsequent models were designed to meet a variety of operating conditions.
The Sea Dragon series ROUVs were foundational in the domestic development of ROUVs in China. Numerous ROUVs were subsequently developed directly based on experience gained from the Sea Dragon series.