Mesochaetopterus rogeri, known as the 🌊 Red Sea ribbon worm, is a marine worm belonging to the family Chaetopteridae, reaching a maximum length of 2.5 meters (8.2 feet). Its long, slender body is characterized by two prominent tentacles banded in black and white, in addition to numerous other feathery tentacles. The body is distinctly divided into three regions: the first region comprises nine chaetigers, with 13-19 modified chaetae present on the fourth; the second region consists of three flat segments, the second and third of which bear accessory feeding organs; and the third region is long and slender. This worm typically resides within a self-constructed sandy tube.
This species inhabits sandy bottoms at depths ranging from 6 to 30 meters (20 to 98 feet). It functions as a filter feeder, capturing plankton and other suspended particles from the water using its tentacles and specialized feeding organs. As a hermaphrodite, Mesochaetopterus rogeri reproduces by releasing eggs and sperm directly into the water. It is not a particularly common species and was first described in 2008.
