Overview
The Assessor (Blue) (Assessor macneilli) is a intermediate saltwater species known for its deep blue-purple coloration. Deep blue. Surfaces.
Origin & Appearance
Origin: Western Pacific.
Colors: Deep Blue-Purple.
Body Shape: Fusiform (torpedo/streamlined). Typical adult dimensions: 6.0 x 1.1 x 1.8.
Sexual Dimorphism: Minimal.
Tank & Water Requirements
| Min Tank Size | 20 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 | Surfaces |
Behavior & Activity
Cave-dwelling inverted swimmer; often swims upside-down under ledges; stays in shaded areas; cautious quick retreats
Speed: 30/100Aggression: 2/10diurnal
Breeding
Moderate; paternal mouthbrooder
Common Diseases
💊 Hardy
Expert Notes
Deep blue; swims upside down in caves