Immature cod like to eat mollusks, while adult sturgeons mainly feed on fish, crustaceans, and molluscs in the water.

When sturgeons are young, sturgeons mainly feed on plankton in the water, including but not limited to insects, algae, and aquatic plants in the water, and they only feed in the middle and upper layers.

Once past the juvenile stage and before reaching adulthood, sturgeons begin to live and feed on the bottom, mainly eating small fish, shrimps, molluscs, and snakes that swim slowly in the water. Staple food.

Adult sturgeons have a very strong demand for food, and the staple food of adult sturgeons is meat, without any vegetarian food. First of all, the fish in the water, especially the fish in the water, are about one-third the size of sturgeons. Fish of all sizes, regardless of species, are almost always the main food source for sturgeons.

Secondly, crustaceans that swim slowly in the water, such as snails and clams, are the favorites of sturgeons. There are relatively few molluscs in the water, but once sturgeons are encountered, they will not let them go.

Sturgeon is a perching fish. Its diet range is relatively narrow. It eats only carnivore. It mainly eats some small or slow-moving benthic animals. In the sea, it mainly eats fish and crustaceans. Next, mollusks are the least. When the sturgeons in the river are still young, they mainly eat bottom-dwelling fish such as genus Ophiophora and pupae, as well as scale shrimps and clams. They generally stop eating during the spawning period.

Sturgeons are carnivorous fish and can feed on zooplankton when they are young, but they soon grow into a benthic life. Suitable for this kind of lifestyle, the mouth of the sturgeon at this time is raised and lowered. The food that sturgeons eat varies with species, and they mainly feed on crustaceans and small fish.