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Scientific Classification
Trinomial Name

Carassius auratus auratus


Goldfish are a species of carp best known as a popular home aquarium fish. They are originally from China and been diversified by breeders in a wide assortment of bizarre varieties.[1]


Close up of goldfish mouth and eyes.

The Goldfish has many different external body parts. Some of them are:

  • Eyes: They have pretty good eyesight, but they do not have eyelids.
  • Mouth: The mouth is located at the anterior end of the fish. These fish don’t have teeth in their jaws. Instead, they have pharyngeal teeth which are located in the back of the oral cavity.
  • Fins: Pectoral fins (are used for steering), Pelvic and Ventral fins (help with steering and stability), Dorsal fin, Caudal fins (for propulsion/move forward), and Anal fin (keeps the fish from rolling over).
  • Vent: The vent is an anal opening and it opens to the digestive, production, and urinary tracts.
  • Caudal Peduncle: This is where the tail is attached and meets the body.
  • Lateral Line: The lateral Line is a sensory organ, which is a bunch of canals filled with fluid, and it is located underneath the skin. This organ helps the fish find water current, movement, and water pressure.
  • Operculum: This is a flap that covers the gill.[2]


Goldfish spawn in summer and spring and they will lay millions of eggs, which stick to water plants. The eggs usually hatch within a week.[3] Goldfish are usually sexually mature and ready to reproduce after two years.[4]Breeders have been able to develop many different bizarre varieties of goldfish.[5]


The goldfish originated from China, but they can now be found all over the world in rivers, ponds, slow-moving waters, lakes, and aquariums. They can survive in freshwater with a temperature ranging anywhere from 0 ºC to 30 ºC. Goldfish are omnivorous (eat both plants and animals) and their diet consists of plants, plankton, insects, worms, mosquito larva, small mammals, reptiles, and amphibians. Goldfish can live up to about 25 if they are well taken care of. They live in groups and they breed quickly so sometimes there are problems with goldfish crowding out the native fish populations. The goldfish’s predators are raccoons, turtles, heron, and fishermen who use them as bait.[6]

Goldfish Pet Care

Goldfish in Tank

For proper care of your pet goldfish, there are some things you need to know. One of them is whether or not you should get a bowl or an aquarium/tank for your fish. Goldfish normally don’t live very long in a bowl because there isn’t enough air surface. Goldfish also need filtration (which you cant get in a bowl), and because goldfish grow very fast, they need about ten gallons of water per fish.

A tank is a lot better for goldfish because there is more air surface, and you can hook up filters to a tank. You also need to make sure that you have a light in the tank turned on for eight hours a day. Make sure that the tank is not in a place like a windowsill where it is in direct sunlight.[7]

Goldfish Crackers

Cheddar Goldfish Crackers

"The Snack that Smiles Back" is the Goldfish products advertising tagline. The song lyrics for the product's jingle:

Let's hear it now for Goldfish

Yes, baked and not fried Goldfish

The yummy snack that smiles back

Until you bite their heads off

Did you know they're made with real cheese

Even though they look like fishies?

The snack that smiles back, Goldfish![8]