Red Flower Crab (Orisarma intermedium)

From Pet Wiki
Jump to navigation Jump to search
Red Flower Crab
Orisarma intermedium
Red Flower Crab (Orisarma intermedium)
Name Red Flower Crab
Name Lat. Orisarma intermedium
Synonym Sesarmops intermedium
Family Mangrove Crabs
Family lat. Sesarmidae
Order Decapods
Order lat. Decapoda
Origin Southeast Asia
Habitat Estuaries, mangrove
Diet Insects, leaves, fruits, crab food
pH 7.0-8.0
Behavior ♂ semi-aggressive
Keeping Pair, harem
Care Level Easy
Reproduction Marine larval stages
Breeding Difficult
Life Span 3-4 years
Protection No
Metric Units
Size 3-4 cm
Temperature 20-28 °C
Hardness 10-20 °dH
Aquarium ~ 50 l
US Units
Size 1.2"-1.6"
Temperature 68-82 °F
Hardness 178-356 ppm
Aquarium ~ 15 gal

Distribution and habitat

The dancing crabs are widespread in the Indo-Pacific region, from southern China to Thailand and Indonesia. They live amphibiously in the intertidal zones of rivers, in mangrove swamps and on sandy beaches.


They need a terrarium (aquaterrarium) with a deep substrate suitable for cave building, made of non-rotting substrate such as sand-peat mixture with coconut fibers and sphagnum moss with a drainage, covered with leaves and pieces of bark. In addition, climbing branches with rough bark, branch forks in which water can collect as well as a shallow water basin

Advantageous are artificial plants as a screen, which can be easily removed for cleaning. Daily 1-2 times the terrarium must be finely sprayed with water inside (humidity), but better is a rain or fog system.

In the water tank, the water quality must correspond to that for the average keeping of freshwater fish. Regular partial water changes are required to maintain water quality. When using a filter, make sure that only a weak current is created and that no animals can be sucked in

Temp. air: 20-28 °C Temp. water: approx. 25 °C Humidity: 70-90 %

The lighting duration must be 10-14 hours depending on the season. Daylight fluorescent tubes with low UV content are very suitable, supplemented with spotlights.


They need animal and vegetable food. The food offer consists of foliage (oak, beech, sea almond tree), vegetables (peas, carrots, zucchini, etc.), fruit (apple, pear, banana, etc.) supplemented with high-quality dry food for fish, crabs and shrimps (spirulina tabs) and commercial frozen food mixtures. Occasionally, chicken meat and smelt can be offered. It is important to regularly add minerals (cuttlebone, calcium powder) and vitamins

A regular and varied diet promotes health and prevents deficiency symptoms. Unaccepted food should be removed after 4-5 hours.

Behaviour and compatibility

They are usually well tolerated within the species and should be kept in a harem or at least in pairs. Socialization with shrimps and snails is possible, but it is better to keep them in a species tank.

Basically only mutually compatible species with similar demands on water quality and water temperature should be kept together

Reproduction and breeding

The males have much larger claws.

The females carry several thousand eggs in their abdominal pouches until the larvae hatch. The larvae live planktonically in seawater, where they go through several stages of development until they return to land as finished juvenile crabs about 5 mm in size.

There are no known reports of successful breeding in the aquarium.


With increasing age, the animals live predominantly terrestrial

Special attention should be paid to a good cover of the aquaterrarium, as they are escape specialists. Escaped crabs dry out quickly.

The aquaterrarium must have good ventilation without drafts and meet the species specific needs. Measuring devices such as thermometers, hygrometers, etc. are necessary. The lighting must correspond to the species-specific day-night rhythm and must be installed in such a way that the animals cannot injure themselves. Contamination must be removed regularly.

Further literature can be found in your pet store.


Text: petdata; Image: petdata

Source: WERNER (2002): Garnelen, Krebse und Krabben im Süßwasseraquarium, Verlag ACS; ENGELMANN & LANGE (2011): Zootierhaltung - Tiere in menschlicher Obhut: Wirbellose, Verlag Harri Deutsch