5) A goldfish can live up to ten years in captivity.

Goldfish have an impressive lifespan, reaching up to 10 years if kept in optimal conditions. Proper care and nutrition are essential for a healthy, long life for your goldfish. They can live up to 40 years in the wild! In addition, goldfish are a popular choice for outdoor ponds, since they are cold-water fish.

6) A goldfish can breathe through its mouth and gills.

Goldfish have the ability to breathe both through their mouth and their gills, allowing them to extract oxygen from the water. This is useful for goldfish who live in low-oxygen environments, as they can access oxygen in the air if necessary. It’s a unique adaptation that sets goldfish apart from other types of fish.