Sea bass is a kind of carnivorous fish with strong predation. Larvae feed on rotifers, cladocera, copepods and silkworms. When they grow up, they will prey on small fish, shrimp, insects and so on. And they will eat each other when the bait is insufficient. Fertilization (organic fertilizer or inorganic fertilizer) can be used to cultivate largemouth bass in ponds and promote the reproduction of zooplankton for largemouth bass to swallow.

In the artificial breeding of largemouth bass larvae in cement ponds, newly fed fry should be fed with rotifers or Artemia nauplii, 5-8 times a day, and the feeding amount should be adjusted according to the feeding situation of fry. When the fry grow to about 1 cm, large otters can be fed; When it grows to about 2 5 cm, it can be fed with silkworms. Bait training generally begins when young fish grow to 2.5-4.0 cm. Bait training can be carried out in the corner of cage or pool, so that it can gradually transition from feeding biological bait to feeding artificial feed.

In the United States, artificially prepared soft pellet feed is used to feed largemouth bass during feeding period. At first, more fish were added to the compound feed, and later, the amount of fish was reduced every day, so that young fish gradually switched to ordinary pellet feed or chopped small miscellaneous fish. The diameter of soft pellet feed should be adjusted according to the size of fish species (generally 1.0-2.5 mm). Before feeding the compound feed, appropriate amount of water should be added, mixed evenly and extruded into soft pellet feed. Feeding times should be less, at least 8 times a day at the beginning, and then reduce the feeding times with the growth of individuals.

In order to avoid cannibalism of juvenile largemouth bass, attention should be paid to regular screening and grading to make their specifications uniform, which is an important measure to reduce cannibalism rate.