Do Goldfish Really Have a 3 Second Memory? The Truth Behind the Myth

Cartoon of a goldfish with a thought bubble showing it struggling to remember where it left its keys

MYTH: Goldfish memory spans are just three seconds long FACT: Goldfish can remember things for months! Most goldfish keepers will have heard the “fact” that goldfish memory spans are just three seconds long – but is it true? Is the memory of goldfish really that short? The answer is a very definite no! Scientists have proven … Read more

Do Goldfish Sleep? How, when and how can you tell?

Cartoon of a goldfish sleeping with its eyes open

Goldfish do sleep, but not in the same way people do. Goldfish sleep is more like resting.

Like people, goldfish tend to sleep at night time, when it’s dark. Watch your fish at night and you might notice them hovering in one spot, only moving slightly to keep themselves stable in the water.

This behaviour tells you that your goldfish is sleeping.

The hovering spot will usually be somewhere near aquarium decorations and lower down in the tank.

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Do goldfish need light?

Silhouette of a cartoon goldfish with a torch

Do goldfish need light? Well, how would you like to be kept in the dark?!

Like most animals, goldfish would not be healthy if permanently kept in dark conditions.

Unlike some fish that live deep in the sea, wild goldfish live in lakes and rivers. These relatively shallow waters are often illuminated by quite bright daylight. Therefore, the lighting conditions in your aquarium should replicate this natural environment as closely as possible.

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