Singles Day in China proved highly successful for e-commerce sites Alibaba and JD.com.

Alibaba sold more than 2.7 million Canadian coldwater shrimp, 1.6 million Argentinian red shrimp and 260,000 black tiger shrimp through Tmall Fresh only four hours into the start of the Nov. 11 shopping event.

For JD.com, fresh food was one of the biggest selling categories for Singles Day, with 500,000 Thai black tiger shrimp sold during the 24 hours, according to Fortune.com.

Several seafood companies told IntraFish at the China Fisheries and Seafood Expo in Qingdao that they would be taking advantage of the big sales day as well.