Holothurians, also known as sea cucumbers, play an important role in bottom ocean ecosystems, as they ingest and cycle sediment and nutrients through their systems for other animals on the seafloor. This sea cucumber, which measured about 10 centimeters (four inches) long, was seen while exploring at a depth of 2,325 meters (7,628 feet) on an unnamed seamount in the south central portion of the Johnston Atoll Unit of the Pacific Remote Islands Marine National Monument.