The theory behind it is that if a goldfish is deprived of sunlight ... while the pointy-snouted reef fish can change from white to reddish brown in response to environmental changes.

Goldfish have been lied about more than any other pet. No, they don’t have three-second memories, and no, they can’t live forever in a bowl the size of a latte. These fish are drama queens with long ...

In reality, goldfish (Carassius auratus) have much longer memories — spanning weeks, months and even years, Brown said. And the science to back this up has been around for more than 60 years.