Common name: Thorny sea cucumber

General information

The Sea Cucumber, scientifically known as Colochirus quadrangularis, is a fascinating invertebrate that is often overlooked in the reef aquarium hobby. Despite its less flashy appearance compared to corals and fish, it plays a crucial role in the ecosystem of a reef tank. This species is part of the Holothuroidea class and is known for its unique square cross-section and four rows of tube feet that aid in locomotion.

Care

Colochirus quadrangularis is a detritivore, consuming organic matter and detritus in the substrate. In the aquarium, they require a well-established system with a deep sand bed and live rock to thrive. They are sensitive to changes in water quality, so stable conditions and regular maintenance are essential. It's important to ensure that the tank is free of aggressive fish that may harm these gentle creatures.

Reproduction

Sea cucumbers have a unique reproductive strategy. They can reproduce both sexually, by releasing sperm and eggs into the water column, and asexually, through a process called fission. In the aquarium, sexual reproduction is less common, but hobbyists may observe fission if the conditions are right.

Habitat

Colochirus quadrangularis is found in the Indo-Pacific region, typically in shallow waters on reef flats and slopes. They prefer areas with moderate to strong currents which facilitate feeding on suspended organic matter.