The Coco Worm, also known as the Feather Duster Worm, is a colorful and interesting addition to any saltwater aquarium. These worms are filter feeders and require a tank with a salinity level of 1.020-1.025.
 
Coco Worms come in a variety of colors, including pink, red, and orange, and can grow up to 12 inches in length. They are generally peaceful and do not pose a threat to other fish or invertebrates in the tank.
 
In terms of tank decoration, Coco Worms prefer to attach themselves to live rock or other structures. They are filter feeders and will consume small particles of food from the water column. They are most active at night and will retract their tentacles during the day.
 
Coco Worms are a unique and interesting addition to any saltwater aquarium, but they do require a stable and mature aquarium to thrive. They are sensitive to changes in water quality and can be difficult to care for, so they are best suited for experienced aquarists.