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When the pupils on a goldfish are very large and dilated, this can mean one of two things. The fish could have a parasitic infection or a bacterial infection.

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11y ago

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Does dilated pupils mean they are large or small?

Dilated pupils refer to pupils that are abnormally large. This can be caused by various factors such as low lighting conditions, drug use, or medical conditions like eye trauma or certain neurological conditions.


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What happens when the pupils doesn't change size what happens if they remain large and why does they remain large?

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