Others are strict carnivores that feed on fish and other animals. Some bottom feeders are detritivores, meaning they search for food that is made up of both decomposing plant and animal matter. However, there are some species whose mouths point upwards, too. That’s why bottom feeder fish are often known as part of the ‘cleanup crew’ and essential for helping keep a tank clean. One common thing most of these fish share is their ability to help keep the bottom of a tank clean due to their downward-pointing mouths. Many bottom-feeding fish are adept at burying themselves in the substrate they also usually have a flat underside which is useful for resting on the bottom of the tank. Thank you, Robert! What is a bottom feeder fish? This article on bottom-dwelling aquarium fish is a guest post by Robert from, an aquarium website dedicated to educating fish enthusiasts all over the world. Which bottom feeder fish species are small and easy to keep in a freshwater aquarium? We’re going to take a look at five of the most common bottom feeder fish available and discuss their appearance, behavior, dietary needs, and preferred tank conditions. Bottom feeder fish live and feed on the lower section of the aquarium where they can bring a great addition of life and color! In the aquarium hobby, there are typically three zones in your tank that you want to consider when stocking to ensure you have an even spread of fish: there are surface feeders, mid-water fish, and bottom feeder fish.
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