Overview
The Royal Gramma (Gramma loreto) is a beginner saltwater species known for its purple (front), yellow (rear) coloration. Purple/yellow bicolor. Bottom to Mid.
Origin & Appearance
Origin: Caribbean.
Colors: Purple (front), Yellow (rear).
Body Shape: Fusiform (torpedo/streamlined). Typical adult dimensions: 8.0 x 1.4 x 2.4.
Sexual Dimorphism: Minimal.
Tank & Water Requirements
| Min Tank Size | 30 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 | Bottom to Mid |
Behavior & Activity
Cave-dwelling hoverer; often hangs upside-down under ledges; darts out to catch passing plankton; quick retreat
Speed: 35/100Aggression: 3/10diurnal
Breeding
Moderate; egg depositor in cave
Common Diseases
💊 Hardy
Expert Notes
Purple/yellow bicolor; cave-dweller