Common name: impatient sea cucumber

Scientific name: Holothuria impatiens (Forskål, 1775)

General information

The Donkey Dung Sea Cucumber, scientifically known as Holothuria impatiens, is a species of sea cucumber that is often sought after by advanced reef hobbyists for its detritivorous habits. This echinoderm is known for its ability to consume large amounts of organic waste, which helps to maintain water quality in the aquarium.

Its appearance is quite distinctive, with a leathery skin and an elongated body that can vary in color from dark brown to black. The name 'Donkey Dung' humorously refers to its shape and color, resembling a piece of dung.

Details

Recommended minimum tank volume
200 liter (53 gallons)
Salinity
S.G. 1.023 to 1.026
Temperature
22 to 26 °C (72 to 79 °F)
Acidity
pH 8 to 8.4
Average size
30 cm (1′)
Care level
Moderate to easy Needs a deep sand bed for burrowing.
Diet
Detritivore Consumes detritus and leftover food.
Reefsafe
Yes
Aggression
Peaceful
Captive bred
No

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Echinoderms
    Echinodermata
  3. Class
    Sea Cucumbers
    Holothuroidea
  4. Order
    Sea Cucumbers
    Aspidochirotida
  5. Family
    Sea Cucumbers
    Holothuriidae
  6. Genus
    Sea Cucumber
    Holothuria
  7. Species
    impatient sea cucumber
    Holothuria impatiens (Forskål, 1775)
  8. Synonyms
    Fistularia impatiens Forsskål, 1775
    Holothuria botellus Selenka, 1867
    Holothuria fulva Quoy & Gaimard, 1834
    Holothuria impatiens bicolor Clark, 1938
    Holothuria impatiens concolor Clark, 1921
    Holothuria impatiens lutea Clark, 1921
    Holothuria impatiens pulchra Clark, 1921
    Holothuria impatiens bicolor Clark, 1938
    Holothuria impatiens concolor Clark, 1921
    Holothuria impatiens lutea Clark, 1921
    Holothuria impatiens pulchra Clark, 1921
    Holothuria ophidiana Quoy & Gaimard, 1834

Care

Holothuria impatiens requires a spacious tank with a deep sand bed and plenty of live rock to thrive. It is sensitive to changes in water quality, so stable conditions and excellent filtration are crucial. This species is not recommended for beginners due to its specific care requirements and sensitivity to environmental changes.

Reproduction

Reproduction in Holothuria impatiens is typically sexual, with individuals releasing eggs and sperm into the water column where fertilization occurs. In the aquarium, breeding is rare, but if conditions are ideal, it is possible to observe spawning behavior.

Symbiosis

While not known for any specific symbiotic relationships, the Donkey Dung Sea Cucumber plays a vital role in the ecosystem by processing detritus and aerating the substrate, which can indirectly benefit other tank inhabitants.

Habitat

In the wild, Holothuria impatiens is found in a variety of marine environments, from shallow reefs to deeper waters. They are often seen partially buried in the substrate or moving slowly across the tank floor in search of organic matter to consume.