The time of steaming seafood is determined by the size of seafood. Steam some little seafood for 8- 15 minutes, such as sweet snails, snails, razor clam, oysters, sea melon seeds, shrimps, etc. It takes 20-30 minutes to steam medium and large seafood, such as mussels, bass, king crabs, abalone, scallops and squid. Clean seafood before steaming to avoid impurities or fishy smell.