How much plankton does an average fish eat?

Question

I know not all fish eat plankton...but of the fish that do, how much do they eat a day?

Answer 1

Fish feed on plankton and other hydrobios.How much plankton they eat varies which largely depend on the availability of the planktons and the presence of other food sources available.

An average-sized blue whale is said to eat 2,000 to 9,000 pounds (900 to 4100 kg) of marine plankton each day during the summer feeding season in cold, Arctic waters.