At a glance the quick version
Looks how to spot one
Thin exoskeleton with flattened, paddle-like claws
A small, flat-clawed shrimp with a cream to white body covered in large spots: red in Pacific animals, purple to blue in Indian Ocean animals and a mix of both in Hawaii. Its claws and eyes look flattened, and it carries leaf-shaped sensory antennules on its head.13
Personality what they are like
Peaceful and calm towards fish and corals. Pairs stay close and cooperate.31
Daily activity how busy a day looks
Slow and deliberate, spending much of its time near shelter and working on its food.13
Grooming and care the hands-on bits
Moderate care level, mainly because of its specialised diet. Keep water stable and copper-free, provide iodine for moulting and keep moderate lighting.3
Home where they are happiest
A marine reef aquarium with rockwork and moderate light. LiveAquaria gives 72-78 °F (about 22-26 °C), pH 8.1-8.4, dKH 8-12 and specific gravity 1.023-1.025. Wild animals live at 1-20 m depth. No minimum tank size was given by the sources.32
Food basics what goes in the bowl
A specialist that eats sea stars and almost nothing else. Keepers must supply starfish such as Linckia or Fromia, and it occasionally takes sea urchins.13
Company who they like around
Best kept as a mated pair; pairs forage and breed together.13
The story where it all began
The harlequin shrimp was described by Dana in 1852 and is the only member of its genus. Its strikingly painted body has made it a prized, if specialised, aquarium animal.21
Fun facts for the dinner table
- 1
Pairs team up to flip a sea star onto its back before feeding.1
- 2
It is known to feed on the crown-of-thorns starfish, a major coral predator.2
- 3
Its spot colour varies by ocean: red in the Pacific, purple in the Indian Ocean and both in Hawaii.1
- 4
A female can produce anywhere from about 100 to 5,000 eggs in a season.1
Recognised by the official bits
- Taxonomy (via SeaLifeBase)
- Described by Dana in 1852. Some taxonomists treat the Indian Ocean form as a separate species, Hymenocera elegans.2
- Wikipedia
- Synonymy of H. elegans with H. picta noted.1
The care rhythm Furry Diary remembers it for you
A typical home-care rhythm for a Harlequin Shrimp. It is our own starting plan, not a vet's advice, and you can change every line in the app.
- FeedingDepends on species, many feed from the light and the watervaries
- Salinity checkevery week
- Water testevery week
- Top-upTop up evaporation with fresh RO water, not salt waterevery day
- Water changeAbout 10 to 20% of the waterevery 2 weeks
- Light checkevery month
Like what we are building? Buy us a coffee.
The breed atlas is free for everyone, with a source on every fact, and it will never show ads. If it helped you, a small tip keeps the research going. Any amount is lovely, and no is a perfectly fine answer too.
Where this comes from
Every breed page shows where each fact comes from. If we got something wrong, sorry, we are pet people, not a science magazine. Tell us at support@furrydiary.app and we will fix it.
- Harlequin shrimp (Wikipedia) en.wikipedia.orgused for names, range, size, appearance, pairing, diet, reproduction, fun facts
- Hymenocera picta, SeaLifeBase sealifebase.seused for author and year, depth range, max length, crown-of-thorns diet
- Harlequin Shrimp, LiveAquaria liveaquaria.comused for care level, water parameters, aquarium diet, max size
Checked 2026-09-30. Text is written in our own words from these sources.