Common Goldfish

Carassius auratus

Common Goldfish (Carassius auratus) — Varies care, Peaceful, under Other. Minimum tank in the app: 24 US gal min; aim for 39–82°F and pH 6.5–7.5. The Common Goldfish appeals to both novice and experienced aquarists due to its adaptability and striking appearance.

Care levelVaries

TemperamentPeaceful

Min tank size24 US gal min

pH range6.5–7.5

Temperature39–82°F

Max size7.9 in (20.0 cm)

Captive lifespan10–25 years

SchoolingNo

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.

Natural distribution

Asia

East & Southeast Asia

Regional colours match the stocking calculator’s origin map.

Common Goldfish Tank Setup

A minimum of 90 liters is essential to accommodate their growth and bioload. Focus on a spacious layout with gentle flow and moderate lighting. Incorporate plants and decor to create hiding spots while leaving open swimming areas to balance security and freedom.

What Do Common Goldfishs Eat?

Goldfish are omnivores and tend to feed at a moderate pace. Competition can arise during feeding, so distribute food across the tank to minimize aggression and ensure each fish gets adequate nutrition.

Common Goldfish Tank Mates

Ideal companions include larger, similarly sized species that can tolerate goldfish's semi-aggressive nature, like certain barbs or larger tetras. Avoid mixing with very small or overly timid fish, as they may become stressed. Intraspecies, goldfish can be kept alone or in groups, but ensure ample space to prevent territorial disputes.

Are Common Goldfishs Good for Beginners?

Care demand varies with setup and individual fish; use the numbers above as your baseline. Aquarists often underestimate the space and filtration needs of goldfish, leading to stunted growth and poor water quality. neglecting water temperature and pH stability can cause significant health problems.