Overview
The McCosker's Flasher Wrasse (Paracheilinus mccoskeri) is a intermediate saltwater species known for its orange-red, blue highlights coloration. Orange with blue highlights. Mid to Top.
Origin & Appearance
Origin: Indo-Pacific.
Colors: Orange-Red, Blue highlights.
Body Shape: Fusiform (torpedo/streamlined). Typical adult dimensions: 8.0 x 1.4 x 2.4.
Sexual Dimorphism: Strong; sequential hermaphrodite; terminal males more colorful.
Tank & Water Requirements
| Min Tank Size | 30 gallons |
| Temperature | 75–81°F |
| pH Range | 8.1–8.4 |
| Water Hardness (GH) | dKH 8-12 |
| Bioload | low |
| Oxygen Demand | low |
| Plant Safe | yes |
| Aquarium Position | Mid to Top |
Behavior & Activity
Mid-water display swimmer; males flash colors with rapid fin spreading above reef; constant movement
Speed: 50/100Aggression: 3/10diurnal
Breeding
Not bred at home; pelagic spawner
Common Diseases
💊 Ich
Expert Notes
Orange with blue highlights; peaceful