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Despite having excellent eyesight, goldfish cannot see in the dark and must instead rely on their extraordinary sense of smell to find food. The lateral line organ in goldfish also aids in the detection of any vibrations and movements in the water, enabling them to spot their prey or predators in the dark.
Your goldfish may suffer serious health problems if you keep it in the dark all the time. Goldfish won’t be able to survive without light for very long because it can cause them to lose their natural colors and experience extreme stress, both of which can result in their death.
Goldfish require both a light and a dark phase; without both, they will grow stressed to the point that they become ill and may even perish. This means that while goldfish cannot survive in complete darkness, they can also not endure prolonged exposure to light.
Yes, goldfish can eat in the dark because they have an excellent sense of smell that guides them to food. However, they won’t be able to effectively consume food, hence the majority will go uneaten. Therefore, I recommend you feed your fish throughout the day or while your aquarium light is on.
Deep-sea fish are able to move through complete darkness. The lateral line is a row of pressure-sensitive organs that runs along each side of a fish’s body, allowing fish to sense adjacent species by detecting changes in water pressure without actually seeing them.
Yes, goldfish can see outside of their tank. They can scan the entire room for activity because of their excellent eyesight. Their vision will be worse as they move farther away or if dark which will result in decreased clarity in their vision.
Your goldfish use their keen sense of smell to find their way about in the dark because they are unable to see. Goldfish won’t be able to endure for very long in complete darkness. The aquarium lights should be turned off at night because goldfish require a healthy contrast between day and night. If you put your goldfish in total darkness, or in permanent light they will become stressed out, lose their color, and become ill.