Koi

Cyprinus rubrofuscus

Advanced care level

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Pond-oriented large fish; not a typical small indoor aquarium pet.

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Enclosure size
Needs a large dedicated enclosure or dedicated room space (space demand 100/100).
Heating
Needs an actively controlled temperature gradient maintained by dedicated equipment (environmental control demand 60/100).

System requirements

Water type: Freshwater pond
Minimum system volume: 500 L
Temperature: 15–25 °C
Minimum group size: 3 animals

The matcher treats system volume as a hard constraint: a species that needs more water than you can maintain is removed from your results rather than ranked lower.

What this animal needs from you

Scores are normalised 0–100 for comparison across very different animals. They are product-normalisation values with a stated confidence, revisable through expert review.

Your time and attention

Daily care/time commitment45/100confidence 60%

Human interaction need5/100confidence 60%

Enrichment/mental stimulation need30/100confidence 60%

Typical handling tolerance5/100confidence 60%

Space and environment

Space/enclosure need100/100confidence 60%

Habitat setup complexity50/100confidence 60%

Environmental control need60/100confidence 60%

Escape-proofing need20/100confidence 60%

Household impact

Noise/vocalization5/100confidence 60%

Typical cleaning/mess burden60/100confidence 60%

Typical odor burden with proper care5/100confidence 60%

Nocturnal/late activity20/100confidence 60%

Care complexity

Diet complexity50/100confidence 60%

Exotic/specialist vet dependency55/100confidence 60%

Difficulty arranging travel/care65/100confidence 60%

Likelihood of legal/import/CITES complexity30/100confidence 60%

Suitability

Beginner suitability with correct care20/100confidence 60%

Typical fit for calm supervised family households45/100confidence 60%

Need for same-species/compatible social group50/100confidence 60%

Long-term commitment35/100confidence 60%