Koi aren't lightweights either; they typically tip the scales around 35 pounds (16 kg), and experts advise filling a pond ...

Now in order to get a beautiful, reddish-orange ... and is the most expensive koi fish ever sold. Koi may just look like an oversized goldfish, but they're not even remotely related.

You have to introduce it, and that's where a lot of goldfish owners slip up because you can't just buy a fish the same day you get your tank. The process of growing bacteria takes patience.

26 x 32 in. (66 x 81.3 cm.) Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...

In midsummer there are bursts of cheerful laughter from time to time near the pond in the wild Little fireflies are flying in the sky playing happily with little goldfishes in the water After ...

Image credits: chanelworldwide RidgeX went on to show the beautiful ... Stuy Goldfish Pond, and RidgeX’s recent footage captured the animals’ habitat and good condition, the little fish ...

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 ...