Filter feeder lure plankton or small fish into its mouth. The basking shark is a passive filter feeder, filtering zooplankton, small fish, and invertebrates from up to 2,000 tons of water per hour. Unlike the megamouth and whale sharks, the basking shark does not appear to actively seek its quarry; but it does possess large olfactory bulbs that may guide it in the right direction. Unlike the other large filter feeders, it relies only on the water that is pushed through the gills by swimming; the megamouth shark and whale shark can suck or pump water through their gills. Manta rays can
Fish ball can also be used. The proportions depend on the quality and type to be made. The white fish balls found in some traditional Hong Kong restaurants are made using fresh fish; while street style are made using cheap fish and a mixture of flour to reduce costs. Flathead mullet (九棍魚/烏仔魚) and Daggertooth pike conger (門鱔) are common choices. Originally, to reduce costs, they were likely made by mixing and frying the remaining materials of Chaozhou fish ball (潮州白魚丸) or stale fish. More recently, they began to be imported and nowadays, they are mainly imported by wholesalers and the texture is