Hangu has a broad sea and fresh water area of 4000 hectares. It is good for sea and fresh water breeding and sea fishing.

• 汉沽的海洋捕捞业历史悠历，近年来又利用4000余公顷海淡水水面发展了海淡水养殖业。盛产东方封虾、梭子蟹、红鳍豚、大银鱼等名优品种。