Koia nei te tukanga e kai ai ētahi rauropi noho wai i ā rātou kai. Ka momia te wai ki roto i ngā piha. Ka tātaria e ngā piha ngā kai o roto i te wai, kātahi ka puhaina atu te wai kai-kore. He kaitātari ngā momo mātaitai pērā i te pipi, te kūtai me te tio. He kaitātari hoki te nuinga o ngā ika moana.
A method of feeding used by some water dwelling organisms. Water is siphoned into the gills. The food in the water is filtered by the gills, and the waste water is blown out. Some shellfish, such as the pipi, the mussel and the oyster, are filter feeders. Most whales are also filter feeders.