Royal Gramma (Gramma loreto)
The Royal Gramma is a small, vividly colored saltwater fish
that's perfect for beginner and experienced aquarists alike. Known for their
striking purple-to-yellow body and peaceful (yet sometimes territorial) nature,
they are hardy, reef-safe, and a joy to watch.
Key Features
- Appearance:
Brilliant purple front half blending into a vibrant golden-yellow tail.
- Size:
2–3 inches (5–7.5 cm).
- Temperament:
Peaceful but can be mildly territorial.
- Diet:
Carnivore — prefers small meaty foods.
- Habitat:
Western Atlantic Ocean and Caribbean coral reefs.
Royal Grammas are shy by nature but incredibly hardy, making
them one of the best starter saltwater fish.
Common Names and Scientific Name
- Common
Names: Royal Gramma, Fairy Basslet
- Scientific
Name: Gramma loreto
Fun Fact:
Royal Grammas will often swim upside down or sideways along the roof of caves
and overhangs!
Appearance
Royal Grammas have a very distinctive, two-tone coloration.
Coloration
- Front
Half:
- Rich
violet to deep purple, including the head and anterior body.
- Back
Half:
- Bright
yellow starting mid-body toward the tail fin.
- Fins:
- Dorsal
fin follows the same color split.
- Occasionally
faint, dark line across the eye.
Size
- Average
Size: 2–3 inches (5–7.5 cm).
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Shape
- Body:
Small, elongated, and laterally compressed.
- Face:
Rounded snout with large, expressive eyes.
- Mouth:
Slightly upturned, suited for picking small prey.
Sexual Dimorphism
- Very
hard to distinguish.
- Males
may be slightly larger and display more dominant behavior.
