Species Profile

Comet Goldfish

Carassius auratus var. comet

GoldfishpeacefulLong-finned

Adult size

12″

Minimum tank

75 gal

Temperature

60–72°F

6.5–8

Schooling

Solitary OK

Water level

All levels

Grows from juvenile

Typically sold at ~2″ and reaches 12″ over ~3 years. Plan tank size for the adult, not the fish at purchase.

Diet

Pellets, flake, blanched veggies, frozen

Notes

Slim-bodied single-tailed variety with long flowing fins. Fast active swimmer — will outcompete fancy goldfish at every meal.

Photo: G29 / Wikimedia Commons · Source · CC-BY-SA-3.0