Overview
The Yellowtail Damselfish (Chrysiptera parasema) is a beginner saltwater species known for its blue, yellow tail coloration. Blue body. Mid.
Origin & Appearance
Origin: Western Pacific.
Colors: Blue, Yellow tail.
Body Shape: Deep Fusiform (oval/robust). Typical adult dimensions: 7.0 x 1.4 x 2.8.
Sexual Dimorphism: Minimal.
Tank & Water Requirements
| Min Tank Size | 20 gallons |
| Temperature | 75–79°F |
| pH Range | 8.1–8.4 |
| Water Hardness (GH) | dKH 8-12 |
| Bioload | low |
| Oxygen Demand | low |
| Plant Safe | yes |
| Aquarium Position | Mid |
Behavior & Activity
Moderate reef swimmer; less aggressive than most damsels; cruises in open water near reef; moderate schooling
Speed: 42/100Aggression: 6/10diurnal
Breeding
Moderate; egg depositor on rock
Common Diseases
💊 Hardy
Expert Notes
Blue body; yellow tail; relatively peaceful