Common name: Black teatfish

General information

The Black Sea Cucumber, scientifically known as Holothuria whitmaei, is a large and visually striking echinoderm that is popular among advanced reef hobbyists. This species is known for its smooth, leathery skin and can vary in color from dark brown to black, often with lighter tubercles. It plays a crucial role in the ecosystem by consuming detritus and other organic matter, thus helping to maintain the cleanliness and balance of the reef environment.

Care

Holothuria whitmaei requires a spacious tank with a deep sand bed and plenty of live rock to thrive. They are sensitive to changes in water quality, so stable conditions and excellent filtration are essential. This species is not recommended for beginners due to its size and specific care requirements. It's important to ensure that there are no aggressive tank mates that might harass or harm the sea cucumber.

Reproduction

In the wild, Holothuria whitmaei reproduces by releasing eggs and sperm into the water column, a process known as broadcast spawning. In the aquarium, however, reproduction is rare and not well documented. Hobbyists should focus on providing optimal care rather than expecting propagation.

Symbiosis

While not known for specific symbiotic relationships like those seen in clownfish and anemones, sea cucumbers do host a variety of small organisms, including commensal shrimp and fish that may live on or within their bodies, benefiting from the protection and food scraps provided by the sea cucumber.

Habitat

Holothuria whitmaei is found in the Indo-Pacific region, from the Red Sea and East Africa to the central Pacific. It prefers reef environments and is often seen on reef flats and slopes, typically at depths ranging from shallow waters to about 30 meters.