Description
Gramma loreto, commonly known as the Royal Gramma, is a classic reef fish prized for its striking bi-coloration and peaceful yet confident demeanor. This species displays a vivid purple to violet anterior that transitions sharply into a bright golden-yellow posterior, creating one of the most recognizable color patterns in marine aquariums. Its compact size, bold contrast, and natural hovering behavior around rockwork make the Royal Gramma a visually engaging addition to both reef and community marine systems.
Native to the Western Atlantic and Caribbean, the Royal Gramma thrives in aquariums that replicate its natural reef crevice habitat, where it establishes a small territory and retreats when threatened.
Lighting: Moderate; adapts well to standard reef lighting and maintains coloration under blue-leaning LED systems
Flow: Low to moderate; prefers calmer zones near rock structures and caves
Placement: Lower to mid levels of the aquarium with ample caves and overhangs for shelter
Temperature: 75–80°F (24–27°C)
Salinity: 1.024–1.026 SG
pH: 8.1–8.4
Alkalinity: 8–10 dKH
Diet: Carnivorous; readily accepts frozen mysis, brine shrimp, finely chopped seafood, and high-quality pellet or flake foods
Aggression: Generally peaceful; may display territorial behavior toward conspecifics or similar-shaped fish in smaller aquariums
Adult Size: Up to 8 cm
Care Level: Easy to Intermediate – hardy and well-suited for most established marine aquariums
Compatibility: Reef-safe; compatible with most peaceful community fish and invertebrates when provided adequate hiding spaces
