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Why are my goldfish suddenly scared and darting in their tank?

Updated On September 23rd, 2025

My Goldfish are usually happy cause they have a 120 gallon tank I have 10 Goldfish and they seem scared of something like they swim to one corner wait a bit then swim as fast as they can to the other I mean it’s raining but my White. Loads and Guppies are fine PLEASE HELP

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Answered By Todd Cecil

Veterinarian

Published on February 5th, 2019

Thanks for reaching out about your fish. First, check the water quality for pH, ammonia, nitrites and nitrates. Correct any problems. The water appears fairly green but that in itself does not equate with poor water quality. If the area has high human traffic, that could scare them also. Since the fish school, one scared and there all move. Maybe a visual barrier could provide some security, taller fake plants in the front of the aquarium. Good luck.

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