There are a number of filter-feeding fish, including the largest fish, the whale shark, and among the common food fish are the bighead and silver carp, as well as the sardine. Filter-feeding fish generally feed on zooplankton, bacteria and organic detritus, which they swallow into the water and leave behind through gill rakers. The larger ones can also eat algae, krill and some small autotrophs.

Second, herbivorous fish

In herbivorous fish, the most common is the grass carp and bream, these two kinds of fish mainly to water plants, filamentous algae and plants growing in the water for food. In artificial culture, you can also feed some high-quality pasture as food. It is worth mentioning that the food habits of these fish actually change, as they also eat plankton and insect larvae during their juvenile years, and begin to feed on grasses when they grow up.

Three, carnivorous fish

Carnivorous fish are more, edible fish in the bass, blackfish and catfish are among them, and in the ornamental fish, dragonfish, seven-star knife, pencil fish, and so on also belong to the carnivorous. These fish are often not small and can be large eaters, some can eat small fish and other aquatic animals, and some eat insects.

Four, omnivorous fish

Omnivorous fish have a more varied diet, which makes it easier for them to get food in the wild environment, such as carp, crucian carp, catfish, etc. are omnivorous, ornamental fish are parrot fish, three lakes cichlids, swallowfish and so on. Food-wise, they can eat fish, shrimp and insects as well as accept vegetables and fruits.