Royal Gramma care

Gramma loreto · Saltwater · Beginner level care

A hardy, bright purple and yellow fish that likes caves and rock.

Smallest tank30 gallons

Adult size3 inches

Temperature74 to 80°F

pH8.1 to 8.4

GroupFine on its own

TemperamentSemi aggressive

SwimsMiddle of the tank

Lives5 to 7 years

Watch for: It can fight with similar looking fish, such as dottybacks, so keep it away from them.

Feeding

Twice a day. A small pinch they finish in about 2 minutes. Frozen mysis, brine shrimp, marine pellets.

Claims a territory and guards it.

Fish that pass every check with Royal Gramma in a 60 gallon tank: same water, overlapping temperature, nobody gets eaten and no bullies.

What size tank does a Royal Gramma need?

At least 30 gallons. Adults grow to about 3 inches, so plan for the adult size, not the size at the store.

What temperature does a Royal Gramma like?

74 to 80 degrees Fahrenheit, with a pH of about 8.1 to 8.4. A steady temperature matters more than hitting one exact number.

How many Royal Gramma should I keep together?

One is fine. If you keep more, keep one male, since males fight each other.

What do Royal Gramma eat?

Frozen mysis, brine shrimp, marine pellets. Feed twice a day: a small pinch they finish in about 2 minutes.

Checked against these sources on 2026-11-10. When sources disagree we use the safer number.