Common name: New zealand sea cucumber

Scientific name: Australostichopus mollis (Hutton, 1872)
Brown sea cucumber (Holothuria stellati) on sea bottom, Aegean Sea, Greece, Halkidiki

General information

The Sea Cucumber (Australostichopus mollis), also known as the Spotted Sea Cucumber or New Zealand Sea Cucumber, is a marine invertebrate that is gaining popularity in the reefkeeping hobby. This echinoderm is known for its elongated, leathery body and distinctive dark spots against a lighter background. It plays a crucial role in the ecosystem by consuming detritus and helping to recycle nutrients.

Details

Recommended minimum tank volume
100 liter (26 gallons)
Salinity
S.G. 1.023 to 1.026
Temperature
20 to 25 °C (68 to 77 °F)
Acidity
pH 8 to 8.4
Average size
20 cm (8″)
Care level
Moderate to easy Sensitive to water quality.
Diet
Detritivore Feeds on detritus and organic matter.
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
    Stichopodidae
  6. Genus
    Sea Cucumber
    Australostichopus
  7. Species
    New zealand sea cucumber
    Australostichopus mollis (Hutton, 1872)
  8. Synonyms
    Holothuria mollis Hutton, 1872
    Holothuria robsoni Hutton, 1879
    Holothuria victoriae Bell, 1887
    Neostichopus mollis (Hutton, 1872)
    Stichopus mollis (Hutton, 1872)
    Stichopus simulans Dendy & Hindle, 1907
    Stichopus sordidus Théel, 1886

Care

Australostichopus mollis requires a well-established aquarium with a deep sand bed and plenty of live rock to thrive. They are detritivores, feeding on organic matter and biofilm within the substrate. It's important to ensure that the tank is free of potential predators and that the water quality is maintained at high standards, as sea cucumbers are sensitive to changes in water parameters.

Reproduction

In the wild, Australostichopus mollis reproduces by releasing sperm and eggs into the water column, a process known as broadcast spawning. In the aquarium, breeding is less common but can occur if conditions are ideal. The larvae are planktonic before settling to the bottom and developing into juveniles.

Habitat

Australostichopus mollis is found in a range of habitats from shallow intertidal zones to deeper waters, often burying itself in the substrate. It is native to the cooler waters of the Southern Hemisphere, particularly around New Zealand and southeastern Australia.