7) A goldfish cannot close its eyes.

Goldfish lack the ability to close their eyes due to the lack of eyelids. They are therefore forced to keep their eyes open at all times. To keep their eyes lubricated and protected, goldfish rely on the constant flow of water to flush away dirt and other irritants. In order to rest, goldfish will use their tail fins to press against surfaces and slow down their movements.

8) A goldfish has a heart rate of around 100 beats per minute.

Goldfish have a rapid heartbeat, usually around 100 beats per minute. This helps them stay active in the water and respond quickly to changes in their environment. They can also remember things for up to three months, making them some of the smartest fish around! Goldfish can even distinguish between shapes, colors, and sounds!