Grouper. According to Qingdao seafood market prices, wild sea bass is 25 yuan a catty, farmed 16 yuan a catty, grouper 30 yuan a catty, grouper is more expensive. Grouper is the general name of the grouper subfamily (Epinephelinae) fish, belonging to the Scleractinian order (Osteichthyes), the spoke-fin subclass (Neopterygii), the spiny fins of the general order and so on.