In natural waters in the main feeding phytoplankton, filamentous algae, benthic algae and organic matter in soil, insect larvae, water, such as earthworms.

• 在自然水域中主要摄食浮游植物、丝状藻类、底栖藻类及泥中有机物质、昆虫的幼虫、水蚯蚓等。