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I have a small water tank with few fish at home. There are small stones for decoration, and for several weeks now, I noticed that every time I'm around, the fish go down to the stones and bump into them on purpose, and it results in some noise.

They didn't do it from the beginning (bought them in August 2019), just maybe 6-8 weeks. (Literally)

They do it now consistently, so I can't help wondering: is it their way to draw attention? I walk to them when they do it to check what they do then they swim up towards me.

To make it more clear, here is the fish tank with the small stones:

image of the fish tank

2 Answers2

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Goldfish do not make noise to get attention but they will come to the surface of the water when you walk up to the tank. Goldfish and other fish will learn that when you come it means food is on its way.

Goldfish are bottom feeders so they will move pebbles and small rocks to find food.

The tank you have is too small for keeping goldfish, please read this https://thegoldfishtank.com/goldfish-care/tank/do-goldfish-need-a-big-tank/

For one goldfish you need a 100 liter tank and for each additional goldfish you need 50 liters of water, so if you want to keep 3 goldfish you need a 200 liters tank and there is no upper limit for tank size, so bigger is better.

You will need to have filtration in your tank to process the waste they make, goldfish are seen as dirty fish as they produce more waste than other fish.

Goldfish being coldwater fish should ideally be kept in a garden pond.

lila
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trond hansen
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My goldfish pops the water with his lips on the surface when he is hungry (every other hour), he wakes me up sometimes, sometimes he even manages to squirt the water.

lila
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Ab Bennett
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