Overview
The Telescope Eye Goldfish (Carassius auratus var.) is a intermediate freshwater species known for its black (also orange, calico) coloration. Protruding telescope eyes. Mid.
Origin & Appearance
Origin: China.
Colors: Black (also Orange, Calico).
Body Shape: Deep Fusiform (oval/robust). Typical adult dimensions: 20.0 x 4.0 x 8.0.
Sexual Dimorphism: Subtle; males develop breeding tubercles in spring.
Tank & Water Requirements
| Min Tank Size | 40 gallons |
| Temperature | 59–75°F |
| pH Range | 7–8 |
| Water Hardness (GH) | 8-20 |
| Bioload | medium |
| Oxygen Demand | medium |
| Plant Safe | mostly |
| Aquarium Position | Mid |
Behavior & Activity
Slow cautious swimmer; poor eyesight from protruding eyes; bumps into things; needs uncluttered tank
Speed: 25/100Aggression: 1/10diurnalSchooling (2+)
Breeding
Moderate; egg scatterer; needs cold period
Common Diseases
💊 Ich
Expert Notes
Protruding telescope eyes