Disclosure: HabitatCraft is a participant in the Amazon Services LLC Associates Program. As an Amazon Associate we earn from qualifying purchases at no extra cost to you.
Royal grammas are one of the easiest marine fish to feed. They are carnivorous planktivores in the wild, feeding on small crustaceans and zooplankton, and they readily accept a wide variety of prepared foods in captivity. Unlike blue tangs, which require daily nori, or mandarin dragonets, which need live copepods, royal grammas will eat almost anything appropriately sized that you offer them.
Royal Gramma Feeding at a Glance
| Diet type | Carnivore / planktivore |
| Best staple food | Frozen mysis shrimp |
| Feeding frequency | Once or twice daily |
| Food size | Small - royal grammas have small mouths |
| Picky eater? | No - accepts most foods readily |
Frozen Mysis Shrimp - The Best Staple
Frozen mysis shrimp is the best staple food for royal grammas. It closely mirrors the small crustaceans they eat in the wild, is nutritionally complete, and is accepted readily by virtually all royal grammas. Thaw in a small cup of tank water before feeding and target-feed near the fish's territory. Offer daily or every other day as the primary protein source.
High-Quality Marine Pellets
Most royal grammas will accept high-quality marine pellets readily, making pellets a convenient daily staple. Choose a small-sized pellet appropriate for a 3-inch fish - standard-sized pellets may be too large. Look for formulas with marine protein sources listed first. Pellets produce less waste than frozen food and are a practical option for daily feeding.
Marine Flake Food
Marine flake food is accepted by most royal grammas and is a convenient supplement. It produces more waste than pellets and has lower nutritional density, so it is best used as a supplement rather than a primary food. Crush larger flakes to an appropriate size for the fish's small mouth.
Frozen Brine Shrimp
Frozen brine shrimp is accepted readily and is useful as a feeding stimulant for new or reluctant fish. Standard frozen brine shrimp is lower in nutritional value than mysis shrimp. Enriched or spirulina-loaded brine shrimp has significantly better nutritional value and is a better long-term supplement. Use as an occasional addition rather than a primary food.
Frozen Cyclops and Copepods
Frozen Cyclops and copepods are excellent supplements for royal grammas. As planktivores, royal grammas naturally feed on small crustaceans like copepods in the wild. These foods are nutritionally dense and are accepted readily. Offer 2-3 times per week as a supplement to the primary diet.
How Often to Feed
Feed royal grammas once or twice daily. Offer only what the fish can consume in 2-3 minutes and remove uneaten food promptly to avoid water quality issues. Royal grammas are active feeders and will typically come out of their cave territory to feed once they are established in the tank.
Feeding New Royal Grammas
Newly introduced royal grammas may hide and refuse food for 24-72 hours while acclimating. This is normal. Offer frozen mysis shrimp near the entrance to their chosen cave - they will often dart out to grab food even when still shy. If the fish is not eating after 5-7 days, check water parameters and inspect for signs of disease. A royal gramma that is hiding but otherwise appears healthy is usually still acclimating. See our Royal Gramma Not Eating guide if the problem persists.
Feeding and Water Quality
Royal grammas are small fish and do not produce the waste load of larger species. Feed measured amounts and remove uneaten food promptly. A protein skimmer helps manage the organic load from feeding in a reef tank. See our Best Protein Skimmers guide.
Feeding Summary
- Daily or every other day: Frozen mysis shrimp - primary staple
- Daily: High-quality marine pellets - convenient daily option
- 2-3 times per week: Frozen Cyclops or copepods - excellent supplement
- Occasionally: Frozen brine shrimp - supplement or feeding stimulant
- Supplement: Marine flake - convenient but lower nutritional density