Holothuria glaberrima

Lore & Background

Holothuria glaberrima has a cigar-shaped body with a leathery, tough cuticle. Its dorsal surface is smooth, while the ventral surface bears three longitudinal rows of dark brown tube feet. At the anterior end, a whorl of twenty bushy black feeding tentacles surrounds the mouth. The species grows to a length of 10 to 15 cm and is generally blackish, dark brown, or occasionally grey, without spots.

This sea cucumber is native to the tropical western Atlantic Ocean, the Caribbean Sea, and the Gulf of Mexico, with a range including the West Indies, Florida, Mexico, and several Central and South American countries. It occurs at depths down to about 42 meters and lives under rocks in areas with considerable water movement.

Sea cucumbers can regenerate their complete digestive systems and grow back most body parts after injury. Because of this ability and the evolutionary closeness of echinoderms to vertebrates, Holothuria glaberrima has been widely used as a model organism in regeneration research, and its genome has been sequenced to support these studies.

Reader's Guide

Holothuria glaberrima holds significance primarily in the field of regeneration biology. The source article states that sea cucumbers are able to regenerate their complete digestive systems and grow back most parts of the body following injury. Because of this regenerative capacity, and because echinoderms are closely related to vertebrates, sea cucumbers have been used in regeneration research. Holothuria glaberrima has been widely used as a model organism for this purpose, and to facilitate these studies, its genome has been sequenced. This makes the species a key subject for understanding the mechanisms of tissue and organ regeneration, with potential implications for vertebrate biology. The article does not provide further details on specific research findings or applications beyond noting its use as a model and the sequencing of its genome.

Did You Know?

• Holothuria glaberrima is also known as the brown rock sea cucumber.
• It has twenty bushy feeding tentacles at the anterior end.