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Royal gramma (Gramma loreto)
Photo: Smithsonian Institution from United States · No restrictions via Wikimedia Commons

Royal gramma

Gramma loreto · Grammatidae

Also known as Fairy basslet

Beginner

Purple-to-yellow, cave-dwelling and perfect for a small reef; hovers rather than swims.

In short: A royal gramma needs at least 110 L (29 US gal), water at 23–27 °C (73–81 °F) and pH 8.1–8.4. It is peaceful, usually kept singly, and rated beginner to keep.

Minimum tank
110 L (29 US gal)
Temperature
23–27 °C (73–81 °F)
pH
8.1–8.4
Adult size
8 cm (3.1 in)
Group size
1+

Reef & marine husbandry

Specific gravity
1.023–1.026
Reef safety
Reef safe
With corals
Reef safe.
With inverts
Reef safe.
Minimum in a mixed reef
110 L (29 US gal)
Minimum fish-only (FOWLR)
110 L (29 US gal)
Aggression
Defends its cave with an open-mouth display, nothing more.
Feeding
Twice daily.

Care requirements

Minimum tank volume
110 L (29 US gal)
Temperature
23–27 °C (73–81 °F)
pH
8.1–8.4
Hardness
8–12 dGH
Lifespan
5–10 years
Diet
Carnivore — mysis, enriched brine, small pellets.
Care level
Beginner

Origin & habitat

Native region
Caribbean
Water type
Saltwater
Biotope
Reef caves and ledges
Natural conditions
Moderate flow with plenty of shaded rock.

Behaviour & stocking

Temperament
Peaceful
Minimum group
1 fish
Swims
Mid-water
Good tank mates
Clownfish
Gobies
Firefish
Cleaner shrimp
Avoid
Other Gramma
Dottybacks

Breeding & difficulty

Breeding difficulty
Intermediate
Sexing
Males are larger with a longer dorsal filament.
Notes
Male builds a nest of algae in a cave.
Common ailments
Marine ich
Bacterial infection after shipping
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