2. the great circle of the earth that is equidistant from the North Pole and South Pole. 3. a circle separating a surface into two congruent parts. 4. celestial equator. [1350â1400; Middle English < Medieval Latin aequÄtor, Latin: equalizer (of day and night, as when the sun crosses the equator).
Commercial goldfish food -- available as flakes, pellets and granules -- contain all the nutrients goldfish need, and should form the major part of their diets. Overfeeding goldfish allows uneaten food to decay and contaminate aquarium water. Goldfish feces is another contaminant.
The common goldfish, also known as feeder fish, is a type of goldfish with no other differences from their ancestors other than their color. Goldfish are a form of domesticated wild carp and are a close relative of koi. Most varieties of fancy goldfish were derived from this simple breed.