While the specific diet of a freshwater fish depends on its species, most eat smaller fish, leeches, worms, insects, crustaceans, plankton and krill. When kept in an aquarium, freshwater fish can thrive on a combination of fortified flake food, pellets, sticks and wafers.Continue Reading
Food for aquarium freshwater fish is divided into three categories: dry, freeze-dried and frozen. Of the three, freeze-dried is the most convenient, preserving the food's original palatability and nutrition, while frozen is the healthiest, using higher quality organisms. Flake food is not suggested for freshwater fish longer than 4 inches as they are unable to eat enough to remain healthy at that size.
When raising freshwater fish in an aquarium, adding micro foods for the smallest fish is helpful. Egg yolks, algae-loaded water and infusoria should all be added to the tank. Infusoria can be created by placing a banana in a jar of aquarium water and slowly adding the cloudy water to the tank.
Freshwater fish can be divided into four categories: herbivores, omnivores, carnivores and limnivores. Carnivorous freshwater fish tend to eat less frequently than the others, while limnivores are constantly feeding on algae and detritus. Some species of fish eat mollusks, while larger carnivores enjoy house flies. Larger freshwater fish can even eat frogs and goldfish.Learn more about Fish
While goldfish will eat crustaceans, insects, plants and smaller fish in the wild, those that are kept as household pets most often eat commercially made goldfish food. This can be safely supplemented with shelled peas, cooked vegetables, brine shrimp and blood worms.Full Answer >
Rainbow fish are omnivores that eat a variety of foods in the wild, including aquatic and terrestrial insects, insect larvae, crustaceans, phytoplankton, zooplankton and detritus. A suitable diet for the aquarium includes algae, vegetables, frozen and live mosquito larvae, Daphnia and bloodworm.Full Answer >
Coho salmon, also known as silver salmon, feed on insects and plankton while they live in fresh water, then switch to a diet of small fish when they reach the ocean. When mature coho salmon return to fresh water, they rarely eat, because their energy is focused on spawning.Full Answer >
Catfish eat worms, frogs, insects, crayfish and other fish. During the colder months of the year when food is more scarce, catfish survive by scouring the bottom of rivers or lakes for dead and decomposing fish.Full Answer >