Why tropical fish stay at the bottom corner of the tank?

Answer 1

could be the side there fed on or that side has more structure like rocks and plants. Or maybe the dont like you looking @ them :) have you got any breeding cichlids in the tank if they have spawned they will chase any fish away from the site eg that side of the tank.

Answer 2

In the wild, the upper layers are generally safer than the deep. Also, Freshwater Fish such as hatchetfish can receive insects that fall from above.

====

Are your fish tropical fish or salt water fish? It is possible that your fish is looking for food. See your local dealer on how to feed your fish. You should do a partial water change about one fifth to one fourth of the water should be replaced with water with no chlorine and at the same tempuratureas your aquarium. It could be a lack of oxygen. There could be toxins in the water like ammonia, nitrites or nitrates. Take a sample to where you bought your fish and they should give you a water analysis for free. Another possibility is a disease. What does your fish look like? Aer there any lumps or spots that do not belong there? Observe the tank and the fish and go to where you bought your fish. The more knowledgeable you are the better that they can help you. Whenever you are not sure, always take a water sample to where you bought the fish.

to breath

Answer 3

Goldfish tend to go slow in the tank and often behave strangely when they are feeling ill because their water is getting hard to live in (poluted) and they are in need of a water change. Try it and see.

Answer 4

Most fish will move around but some species like Bettas will pick a spot they prefer to be in and stay there.

Answer 5

Tropical fish stay at the bottom corner of the tank because they are either cramped up, if the tank is small or the fish species is just like that