That might help explain why goldfish in healthy environments can reach the size of an American football, while your last goldfish wasn't much bigger than your index finger. Once you have a big ...

Scientists have proved goldfish do have good memories and are able to navigate their surroundings. A team from Oxford University trained nine fish to travel 70cm (2.3ft) and back, receiving a food ...

For many people, goldfish are just harmless pets, but when introduced to the wild they are one of the worst invasive species in the world. Goldfish management has become a widespread effort ...

The lifespan of fairground fish is believed by many to be not very long, though plenty of fish have defied the odds and gone on to live long, happy and healthy lives. These goldfish have survived ...